Goovis Lite 3d helmet

I just received this package from China and inside are two boxes with Goofy’s brand name on them the brand name alone tells you this is definitely a product from China

And the brand was invented by someone with poor command of English they probably wanted to combine go and visual making it visual on the go but ended up with something sounding goofy or Goofy’s anyway like many others this brand started as a crowdfunding campaign on both Kickstarter and Indiegogo and this company produces 3D head-mounted displays which you can carry with you hence the name visual on the go they’ve been around for a couple years and have several products in their lineup and this is their latest product which is a light version but before we dive in a deeper review I would like to point out that the box says personal 3D viewer this is important since some early marketing materials from goovies stated that this is a VR headset which it is not this is a 3D capable stereoscopic head mounted display but this is not a virtual reality headset a virtual reality headset is mostly two things immersion and head tracking immersion is achieved through a wide field of view that means that when you put on the virtual reality headset the lenses make the picture all around your eyes so wherever you look you still see the picture and when you move your head the head tracking changes what you see accordingly this is called degrees of freedom and VR headsets come in two main varieties three degrees of freedom and 6 degrees of freedom 3 degrees of 3 them is mostly for viewing those 360 videos and the most popular and well-known devices are Oculus go jrvr Google cardboard and all those headsets where you can insert your phone and use the phone screen and gyroscopic and other sensors for head tracking so basically in a three degrees of freedom headset the viewer is in a fixed position however you can rotate your head and see the environment around you the 6 degrees of freedom headset or full virtual reality adds three more degrees of freedom and in devices like Oculus quests and other headsets you can actually freely move in the virtual environment see the objects from all perspectives and interact with them even newer headsets for example Oculus Quest 3 also add the eye tracking capabilities and they can track not only where your head moves but also where area eyes move and what they see on the contrary a stereoscopic 3D head-mounted display has a more narrow field of view that means less immersion and has zero degrees of freedom that means it doesn’t track your head movements basically using a head mounted device like this is like looking at a big 3D capable display from some distance away so this device is mostly for watching 3D or 2D video content as opposed to experiencing virtual reality this is not a good or a bad thing VR headsets and hmds are just different devices for different purposes although they look somewhat the same this groovy slide is very similar to a Sony hmz T1 a 3D hmd which I owned about 10 years ago and even released several videos about it in my early YouTube days I quite liked the Sony however it had some major flaws and finally I decided to sell it however I still liked using it and been looking around for something like it and that’s how goobies came along so I will be mostly comparing this to Sony atriums at T1 and actually I’m quite interested if this trainees device doesn’t have the same problems that the Japanese Sony did anyway back to the review here are two boxes the smaller one is a wireless device which I will talk about later and the big one is the main show inside the big box is a carrying case and inside the case is a cable a few straps and a 3D display itself the first thing to notice is how light it is the device weighs about 200 grams the material rules used are mostly plastic however there is a metal hinge that connects the forehead rest to the goggles the device is mounted to your head with a few very basic elastic straps with some velcro however they seem to work just fine the forehead piece is placed on your forehead the metal hinge allows the goggles themselves to be flipped up and down much like a night vision device on a helmet that means that all of the pressure goes to your forehead and not your eyes or nose making this an extremely comfortable headset to wear which you can use for entire day without much fatigue on the rear of the goggles there is a vent which acts as an intake for the onboard fan yes this device has a fan and also two adjustment knobs which independently adjust the left and the right lens the the knobs can move left and right once again independently so you can adjust the distance between your eyes it’s very important that this can be done independently since in Sony hmz T1 these knobs were linked together by a sprocket and if you want it independent adjustments you had to disassemble the Sony and remove a sprocket here you don’t have to do that the adjustments are independent and also here is a very cool feature that allows you to correct the lenses if you are far-sighted or nearsighted the knobs rotate with a definitive step and you can adjust your vision from plus 2 to -7 that means that if you have some eyesight problems and you have to wear prescription glasses you don’t have to wear your glasses while using this device you can easily adjust this device or according to your prescription this is a unique feature since none of the other headsets at least that I’m aware of have it you can order prescription lenses for Oculus quests and other headsets but you have to order them separately and it also will be very difficult to use the device if several people with different vision problems want to use it since you will have to order different pairs of prescription lenses here you don’t have to order anything you can adjust your vision right on the headset this is a very cool feature by the way however it’s worth noticing that if you have astigmatism you cannot adjust this device to it the lenses are quite decent as well and they seem to have some coating the soft pad around them is made from some resin like non-porous material and should be quite easy to clean the problem is this pad leaves a gap between your face and the device and that means it allows some light from the outside come into the goggles while you’re using them for example if there is a window to the left or to the right of you and it’s daytime the window can be reflected on the lenses so it’s really advisable to use the goggles in a darkened room you may have noticed that this headset doesn’t have earphones instead they have an audio output connector which is a standard three and a half millimeter Jack so you can use any headphones or earphones you like personally I prefer this approach since the Sony hmz T1 had horrible inbuilt headphones that you could not remove and use your own ones so I definitely prefer not having headphones on a 3D headset however please note this is audio out only so it can only output audio and not receive it so this is an audio out and not audio in you cannot plug in microphone or headset to it the jackfaces directly backwards however even large headphone connectors do not seem to be in the way of even the largest cans however to avoid the issue of the connector hitting the headphones you should use earbuds headphones with an angled connector or an angled connector adapter or just go Wireless the device also has three buttons one is used to control the brightness and the other switches from 2D mode to 3D side by side mode there is also an optical sensor to turn off the displays when you are not using the headset and the permanently wired HDMI cable actually I have mixed feelings about this built-in cable since it’s not detachable that means that you will have a really really bad time trying to replace it since this will involve taking apart the headset and soldering very very thin wires or maybe they use some kind of an internal connector which will certainly make replacement easier on the other hand those headsets that do have a connector usually tend to develop problems with that connector since it’s very tiny and has to endure a lot of stress when you constantly move around pulling the cable oftentimes the connector breaks and in case of oculus which also has an inbuilt battery to power it very often the connector just melts while charging the device these Google’s headset has no inbuilt battery so that shouldn’t be an issue and the greatest thing about this goovish headset is that it is a complete device that’s it it has an HDMI cable which you can plug in almost like a desktop Monitor and use it and it’s very light and portable this is a massive improvement over Sony hmz series which had a special set-top box which acted as a controller for the headset itself and you could not use the Sony hmz headset without that box and that box is Mains powered there is no way you can use it on the go here there is no additional boxes you just have this headset and that’s it it just works however there is one minor issue the device still needs power and HDMI alone cannot provide enough current to power this device that’s why it comes with a special splitter cable which has a female connector for the headset HDMI out a male HDMI connector which you plug into your source and and a USB connector which you plug to any USB power source that may be the source device itself if it also has an USB out most devices nowadays do or it may be an USB power brick or a power bank anyway this device needs power and you cannot power it from HDMI alone that makes this splitter cable an essential part of the package and the funny thing is in some marketing material goovies presented this adapter as a free gift it’s not a gift this is an essential part of the package and in most cases you cannot use the device without it the only exception are the additional devices produced by goovis they make a portable player and a miracast slash power bank combo which can power this device through HDMI alone and you don’t need the splitter cable so let’s have a look at such a device this is a wireless Miracast module and the power bank combo actually these are two separate devices which are held together by magnets and connect to each other with spring-loaded pin connectors the power bank base is basically a 6 amps battery which can be charged with the included USB type-c cable other than that it’s your standard USB power bank with several LEDs indicating the charge status and with a button to switch it on and off that’s it the Miracast part has a spring-loaded pack connector that attaches to the power bank but you can also use it without the power bank by supplying power to it through a USB C Port it also has a reset button and two output connectors one is HDMI and the other one is Type C type c is used for one of the goovis models which is called Young and the HDMI port is a special one not only it carries the HDMI signal but it also carries power that means that with this Google’s device you don’t need the splitter cable to use the headset I have to underline that this is a proprietary way of using HDMI and probably Google’s devices are the only ones capable of supplying enough power for the headset to work this is a non-standard proprietary way to carry power with all other devices you will have to use the splitter cable which is standard and should work with all HDMI enabled devices however you will also need a USB port to power the goggles the power bank base is somewhat confusing name this is not a power bank since you cannot charge anything like your phone from it this is a proprietary device with a proprietary connector to provide power to the Miracast module and the headset and it also has a nice button to turn them off that’s the sole purpose for this device to exist you don’t actually need it as the Miracast model can be also powered from a standard type-c connector you can use any other power bank or wall socket to power it if the power bank doesn’t have a power button you may just need to physically disconnect Miracast when you don’t need it when using a third-party power bank or a power break the Miracast module will still be able to power the headset without the need to use the splitter cable just make sure your power bank or wall adapter can output at least 10 watts that is 2 amps at 5 volts of USB power that’s all that it takes to power wrap both the Miracast module and the guvis light headset however I have to admit that the Google’s branded power bank base is quite convenient it also lasts a few hours on a single charge and even though it gets quite hot about 40 degrees celsius there is nothing to worry about so this is a convenient little device but it’s not a power bank it’s a USB charged battery anyway this is a standard Miracast compatible device and the setup is pretty much similar to any other Miracast devices out there you can use it in two modes either by connecting directly to it via Wi-Fi for example from your phone or laptop or computer and obviously you will not be able to use the device’s Wi-Fi connectivity for other purposes for example for going online so a better way is to connect the Miracast to your existing Wi-Fi network work that is your router this is actually quite simple to do first of all you need to connect the goggles to the Miracast module and look inside the glasses it will display instructions with several QR codes and offering you to download some apps to supposedly easy up the setup process I tried downloading one of them for Android and this app is junk you don’t need it you can connect Miracast via standard options in Windows Android iOS and even Linux without resorting to Shady apps which are filled with ads of other Shady apps to do Miracast so I installed this app just to show it to you and then immediately removed it since you don’t need it basically what you have to do is first connect to the Miracast from your device directly the password to the Wi-Fi network is one to eight after that you have to open a browser and go directly to the Miracast device IP you can find the IP address in the Wi-Fi status of the network or just looking at the Miracast where this IP address is printed after you punch it in the address bar of your browser you will be presented with a list of Wi-Fi networks that the Miracast module has detected you have to select your home network enter the password to the Wi-Fi from your router the Miracast device supports both 2 and 4 and 5 gigahertz Network I strongly advise you to use the 5 gigahertz one anyway enter the password to your router’s Wi-Fi wait for the Miracast to connect you can actually see the status of connection in the upper right corner of the screen inside the goggles so basically this is a two-step process first you connect from your Wi-Fi enabled device directly to the American test model enter the password to your home Wi-Fi network wait for it to connect to the router and that’s it the setup is complete after the setup is complete and the Miracast module is successfully connected to your router you may now connect your phone or other device back to the router’s Wi-Fi and now it will be able to communicate to the Miracast which is now connected to the same router so all devices are on the same network you may also want to disable auto connection to the saved direct Miracast Network so your phone will not try to connect directly to it since after the initial setup is complete you don’t need to do that anymore until you reset the Miracast model with the onboard button after the Miracast module has successfully connected to your home Wi-Fi network all devices connected to your router both wirelessly and through a lan cable would be able to cast to The Mirror test for example in Windows you have to hold the Win key and press P or K on your keyboard and select the Miracast wireless display from there however on my first run Windows was unable to connect to the device to resolve the issue I had to power down the power bank and switch it back on after the Miracast device has rebooted I was able to successfully cast from Windows to the goggles wirelessly to do this on your phone or tablet for example in Android you have to select the cast option from the drawer menu and assuming your phone is on the same Wi-Fi network you can just choose the Miracast device to cast to it once again I wasn’t able to do this on my first run the phone kept on trying to connect to the display but couldn’t do that and to resolve the issue I had to reboot the phone after I did that the cast functionality immediately worked and I was able to successfully cast media for example movies using for instance VLC player of course you don’t have to Go Wireless and you don’t have to buy additional devices like this groovy’s Miracast and powerbank combo you can connect the goggles directly to any device which has an HDMI output that can be your computer your laptop steam deck your TV box DVD player Blu-ray player game console like Xbox or Playstation or any other device that has an HDMI out you will obviously need the splitter cable and use the HDMI plug to connect to the output say your video card and the USB plug to any USB socket that may be any USB socket on the computer or a power bank or a USB wall wart any USB power source will do and those devices that do not have an HDMI out like most phones and for instance Nintendo switch without the base can still be used with third-party OTG USB adapters that provide an HDMI out after that googles will be detected as a standard HDMI monitor and you can use it as a standard display and here comes the muddy part let’s discuss the specs I’m making this video review in December 2022 and by this time Googles has released four headsets the first one G2 in 2018 followed by Pro in 2019 then young in 2020 and finally the star of this show goofy slide in 2021 they have played plans to release their fifth generation next year however currently there are four models they are all in production and the first three of the four models are using the same displays most VR headsets for example Oculus and all those Contraptions where you have to insert your phone to act as a screen use a single panel and both lenses are focused on left and right part of the same display unlike VR headsets hmds that’s head mounted displays usually have two separate screens for each eye so the left lens is focused on its own screen and the right lens is focused on another screen these are two separate identical screens all goovies models seem to be using Sony AMOLED displays however the first three models use a 071 inch AMOLED channels while the goovis lite ses 0 49 inch AMOLED display manufactured by SeeYa, not Sony. in a head mounted device a smaller screen is not a bad thing first of all you can obviously make the device smaller and have the panels closer to your eyes and moreover since all the screens have the same resolution they are all full HD screens 1920×1080 and that means having the same amount of pixels on a smaller surface results in a more densely packed pixels and that is actually good more densely packed pixels combined with a smaller field of view and Google’s light has a smaller field of view eliminates the so-called screen door effect the name comes from mosquito mesh that you normally find on a door or on a window and when you look outside through this mesh you can still barely see the blurred lines that form the grid that makes the mesh a similar effect may happen with head mounted displays and especially with their headsets since the pixels are not too close and the field of view is larger you can actually see the blank spaces between the pixels that form a certain kind of grid somewhat resembling the mosquito mesh that’s why it’s called screen door effect since the gui’s light panels are smaller they have a more densely packed pixels and gooby’s light doesn’t seem to show this effect so there is no screen door effect on gui’s light and that’s a good thing so Google slide not only has a relatively narrow field of view and densely packed pixels but also these OLED screens seem to be newer and since they are OLED they do a much better job with shadows and dark parts of the image the larger screens of the previous models were plagued with black level issues in certain movies with abundance of dark scenes and some color tone temperature issues as well the new screens don’t seem to have this issue at least I don’t feel like I need to adjust anything anyway even if you wanted Google’s light doesn’t have any built-in way to adjust color temperature you will have to do that at the source that is in your computer video card control panel or in a software player and actually the color tone and especially the black levels is the reason why you can only use OLED screens in head mounting displays all at displays or AMOLED displays can provide deep blacks since they don’t have a backlight the drawback of Outlet is the unavoidable degradation of outlets over time after certain period period of time all that screens may experience a burn in especially if you use them for computer purposes where certain interface elements like the taskbar are in the same place for the majority of the time and also over time the cover becomes less vibrant and that happens differently for different colors so the degradation of color reproduction is not even that’s the drawback of all OLED and AMOLED and other types of OLED displays at the moment that’s why this device has a sensor to turn off the displays when you are not looking into them so they work less and last longer that’s why this device has a fan since it’s a very good idea to cool down the OLED displays as well as other components inside even though the fan has no speed control it always goes full bore it’s pretty silent and you can not hear it in your earphones this is probably achieved through some kind of suspended flexible Mount however if you move your head somewhat quickly the fan makes weird noises as if the blades are touching something that’s not a big issue it’s just a minor annoyance there is also an interesting parameter here which is named virtual screen size the idea between hmds has always been giving the user an illusion of being in a large room looking at a large screen for example like in a movie theater for the first three models Goofy’s claims equivalent of 800 inch giant screen at which you look from 20 meters for the goofy slide they claim an equivalent of 150 inch screen which is 5 meters in front of you this is simply not true all hmds I tried to use have the same feeling which I call Alice in Wonderland so the experience is not being in a large room like a theater room you don’t actually get the feeling that the screen is big instead you get the feeling that you’re Alice in Wonderland who has shrunk down and you’re looking at a normal sized screen the difference is you are small not the screen is big that’s why I call it Alice in Wonderland so in my living room I have a 55 inch TV which is about 2 meters from the couch and using Googles is very similar to watching my TV from the couch so I would say that the actual virtual screen size is something like looking at a 60 inch display which is about a meter and a half in front of you and that’s it and also remember that since goobies doesn’t track your head this display is glued and bolted to your head never mind how your tool to rotate your head this screen is always in front of you there is no head tracking anyway the full HD 1080 resolution of the screens is a big improvement over Sony hmz which was only capable of 720 HD resolution however I would like to address the real elephant in the room which is the video format section of this spec sheet as you can see all of the Goofy’s headsets are able to display at least 2D picture and that’s the only format that goovish young supports guvision doesn’t offer any stereoscopic 3D functionality and basically this model is just your regular computer monitor straps to your head it won’t be able to show 3D videos all the other headsets including Google slide can accept at least one 3D format a brief explanation about delivering 3D content is probably required here the reason humans and some other species are able to see their depth in the world and the volume of objects is because humans have two eyes facing in the same direction somewhat apart from each other this gives two visuals of the same object from a slightly different angle the brain combines those images enabling you to see the depth of the picture if you look at something and close one of your eyes you immediately lose the sense of depth so to create 3D visuals we need to somehow recreate this process and provide a separate image of the same objects from a slightly different angle to each of the eyes when shooting real life pictures this is usually done with a special rig which consists of two camera cameras facing in the same direction somewhat apart from each other and shooting two streams of video of the same object at the same time in generated contents like 3D games or CGI movies the virtual scene is also presented from two separate point of views slightly apart from each other to create two pictures of the same object from a slightly different angle this is called geometric 3D that means that each object has the full volume characteristics and looks very real there is also an inferior technique which is called Z buffer 3D that is basically placing flat 2D objects at different depths so the objects are still flat but you can see how far apart they are after you have the content you need to somehow Supply each eye with a separate image from a slightly different angle this is a lived through various means some devices like Nintendo 3DS has special screens that can reproduce 3D images right on the screen however in most cases you would require some kind of glasses to see the image there are two type of glasses shutter glasses and polarized glasses most consumer TVs use the shutter gloss system shuttle glasses are what they are they are synced to the screen and when you put in those glasses they continuously block one eye from receiving picture from the screen so basically first they shot the left eye then they open the left eye but shut the right eye then they open the right eye but chat the left eye and cell on since they are synced to the TV at a certain point in time the screen shows only picture for one eye at a time but since this happens very fast you don’t really notice it and due to the Persistence of vision it each eye is able to receive its own picture from its own Viewpoint with its own angle and you get the perception of depth the polarized glasses are not synced to anything they are very cheap to produce and mass manufacturer and they are mostly used with projectors like in cinemas but some consumer devices that use polarized glasses also exist in polarized 3D both images are projected on the screen at the same time however image for one eye is polarized against the image for the other eye and the glasses in the goggles are polarized in the same way and that’s why each eye sees only the picture that is intended for this very eye however most 3D headsets produce the image for both eyes simultaneously as I said in most VR headsets this is achieved by focusing the lenses on left and right parts of the the same screen so for example the left part of the screen has the image for the left eye and the right part of the screen has the image for the right eye or as is the case with goovis and Sony hmz each eye has its own separate screen and you also need a way to send the image to the screen HDMI 1.4 introduced something which is called frame stacking Iman all the Google’s product line the only headset that actually supports stacking is the gooby’s pro so basically frame stacking is two images stacked together for full HD video a single frame is 1080p that means 920 by 1080. for 3D full HD the horizontal resolution is the same 1920 however the vertical resolution is doubled and there is also a black line between the images so basically the top image is intended for one eye and the lower image is intended for the other eye that’s how 3D content is actually transferred to the display obviously this at least doubles the bandwidth required to send such image and it also doubles the space required to store such files that’s why mostly this option is used in 3D Blu-ray discs however there is a different approach you can take your normal standard 1080 frame split it in half take the two images required to form a 3D picture and squeeze them inside the single frame you are basically changing nothing the file size Remains the Same the bandwidth Remains the Same all the standards and connections and formats remain the same and if you play Such video on a normal non-3d enabled display it will play just fine the only problem you will be seeing both images together on the screen the there are two ways to put both images inside one frame the first one is called over under and the second one is called side by side obviously in the over under configuration one image is at the top and the other is at the bottom and inside by side one image occupies the left part of the screen and the Right image occupies the right part of the screen obviously as the original images were full frame 1080p you will have to deform them to squeeze both images in a single frame for this to be still compatible with normal non-3d equipment to make the stereoscopic image the 3D display the goofy slide in this case takes one part of the image to be shown for one eye and the other part of the frame to be shown for the right eye so it takes half of the frame which is squeezed enlarges it to fit the entire screen and sends it to one of the displays in the goggles then it takes the other part of the image restores the aspect ratio and shows it to the second eyepiece so you can view the content in stereoscopic 3D the only problem with that is since we had to fit two frames in a single frame by squeezing them that means that in side by side mode you retain the vertical resolution however you lose half of the horizontal resolution and this is the only 3D mode which is available on Google’s light so you have to send a side-by-side image then press the button on the headset to switch it to side-by-side mode to be able to see 3D stereoscopic content with half the horizontal resolution which is kinda stupid since the goggles have very capable full HD screens which you can perfectly use to enjoy 2D content in full HD however you can only see half of the resolution in 3D mode finding video content in side by side mode is not a big problem since most streaming services that still stream 3D movies use side by side to send the bandwidth also lots of 3D rips of popular movies that can be downloaded online are also in SBS so there is no issue with actually obtaining 3D content in side by side mode a bigger problem may be games that have to Output SBS if they want to enable stereoscopic viewing however not many titles are still released in stereoscopic 3D so that doesn’t matter as much but still this is my main issue with this headset I would really prefer if it could show 3D content in full HD resolution rather than side-by-side mode talking about resolutions when connecting the headset directly to my PC and getting power from an USB I could get the native resolution of 920 by 1080 with 60hz refresh rate when using it wirelessly in Miracast mode I could get 60 hertz at 1024 and at full HD it was only 30 Hertz I believe this has something to do with the Miracast standard anyway most movies and other types of video content you get is normally either 24 FPS or 30fps so this is quite okay for watching movies wirelessly the wireless mode surely adds a little bit of lag maybe a couple milliseconds but that’s not really an issue if you are using it to watch movies and not play games I had also no problem getting sound the headset can receive audio from both HDMI and Miracast however I advise you to keep it in stereo mode since I don’t think that it can down mix multi-channel audio like 5.1 or 7.1 to stereo so keep its stereo at the source also the inbuilt amplifier that powers the headphone jack is somewhat inferior to the one that is installed in my desktop Monitor and which I use to Output audio from my computer via HDMI the sound is okay but I have a feeling that when connecting the same headphones to my monitor I get a better quality of sound than connecting them to this headset but that’s how I feel it maybe there is no problem that just seems to me so with all that said I really enjoy this device when connected to the computer you can use it in 2D mode with full HD resolution and the image is very sharp and clear even at the very edges of the screen this was a huge problem with Sony hmz since I couldn’t get the entire image clear here there is no Distortion even the smallest text is perfectly visible and readable and since it’s full HD you don’t need to use scaling to actually be able to see the fonts as for 3D content I personally think that head mounted displays are the best way to enjoy 3D movies especially if they don’t have the head tracking so you can relax and put your head in any position or even lie down with your goggles on to watch a movie The 3d effect is very strong especially the pop-ups they look very nice in this headset however you have to keep in mind that this is a personal 3D viewer that means that only one person can use it at a time you can’t really enjoy 3D movie with your partner friends or family together with this device since it’s personal and of course you can watch normal content 2D movies in full HD resolution as well other use cases that I can think of is using it with anything that has an HDMI output the problem is when you take a VR headset they normally do not accept HDMI input you simply can’t connect them for example to your Blu-ray player to watch a movie since they don’t have the connection there are some junky Solutions but they are tedious and not very straightforward here guvis has a standard HDMI connection that works with all HDMI devices including steam deck since this is a very light headset it weighs only 200 grams you can take it around with you connect it to your steam deck and enjoy playing games on the big screen while on the go and I cannot stress using this Gaga those with steam deck enough since steam deck has a horrendous screen not only it is very tiny diagonally it is also not full HD it’s only HD 720 with this headset you can play on your steam deck as if it is connected to a 60-inch OLED TV in your living room you can also connect it to your computer or your laptop to have a big screen on the go and since this is a personal device you can disable your main display for example laptop screen and use these goggles as your monitor when you need some privacy no one will be able to see what you are looking at on your screen the only possible issue here is the cable length it is long enough for using everything that sits on your desk for example a laptop however if you use it with a desktop computer and the case is stuffed somewhere under your table the cable may be not long enough for comfortable use however you may use an HDMI and USB extender to make it longer these goggles can also be used as a monitoring device while shooting videos outside since very often it’s hard to see the viewfinder on the camera especially in broad daylight with lots of sunlight using Google slide as a viewfinder even in the most sunniest of the days you can also connect them to a drone controller if it has an HDMI output to be able to fly your quadrocopter with point of view perspective I wonder if any of the quadrocopters have dual cameras to send back a stereoscopic image since it will be very cool to fly drones with stereoscopic vision to see the depth anyway I am quite happy with this device I will definitely be using it at least for watching 3D content it is definitely much better than the Sony hmz T1 which I had 10 years ago my only problem with this device is that it does not support full real 3D transmission you have to stick with SBS format but that’s kind of fine I really hope that guvis will address this issue in their upcoming new version of this headset if it ever will get released

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