About this item 4K HD Sunglasses Camera - It's a perfect combination of glasses and camera. Firstly it's a sunglasses, 100% UV400 protection polarized lens, protect your eyes from harmful UV rays, reflected light, make vision clear, comfortable and not dazzling. Then it's a camera for take picture and record amazing video with audio. NOTE - Please download the VLC media player to watch your video,it is not support all the player.It is very simple to use, first of all insert a high-speed TF card into smart cameras. Then use the button: 1.One function button: to start and off, take picture or record video with audio. 2.One mode switch button: Use it to choose picture or video mode. Long Time Use - Sports Camera Sunglasses can record about 120 minutes of video when fully charged. You can also use power bank to surcharge during video recording or take picture. Check Your Record - Camera Glasses supports up to a 256GB memory card (NOT INCLUDED),come with 32G memory card and recommend class 10). You can playback the content on a computer or a tv by the included usb cable. Widely Used - Video Sunglasses can use for recording fast action shots, sporting adventures, sailing, yacht, outdoor sports: rock climbing, cycling, camping, driving, fishing, hunting, skateboarding, travel, skiing, running, golf, real CS, law enforcement records etc. Great gift for you, your friends and families.