VISIONHMD BIGEYES H1 are head-mounted 3D viewer/ video glasses,NOT VRGood to watch 3D movies, regular 2D videos, animationsBUT NOT for Video gaming, TEXT/E-book reading, OFFICE WORKING, Internet surfing or CAD DRAWINGThe product only works with a device that has HDMI output. For devices have no HDMI output, please find an adapter or choose another product.Use when your TV is occupied, You just want to lie down, You don’t want to disturb othersSupport 3 3D video formats: Frame packing Blu-ray 3D, Side-by-Side, Top-and-Bottom.each eye equipped one 1280 x 720 LCD, 2 pieces of LCD deliver 3D video experienceHDMI input, easy connect to Blu-ray 3D player, DVD player, Roku, Apple TV, Chromecast, iphone/ipad(Apple Lightning Digital AV Adapter required, and NOT included).Work as a FPV monitor goggles ONLY for the done’s controller with HDMI output (RF receiver not included).Adjustable lens Diopter from 0 ~ 5.0 D without astigmatism or presbyopia. If you are nearsighted, farsighted, having astigmatism or bad eyesight, you must put on your own eye glasses. Or DO NOT BUY this itemAdjustable pupil distance.Video & Audio Input – HDMI, HDCP compatible, support 720p, 1080p video.Audio Output – 3.5mm earphone jack.Power – DC 5V, connect via USB port; power source: USB port on PC, smart phone charger, compatible with most power banksSafety Guide1.DO NOT use the product when you are tired/ sick or you have eyestrain. Stop using if you experience any discomfort or fatigue.2.If you have concerns with your eyes, please consult your doctor before you decide to buy this item.3.DO NOT allow children under the age of thirteen to use the product. 4.Over use may negatively impact your eye vision, rest for 10 minutes after every 30 minutes of using is advised.