AGPtek Black Google Cardboard Universal Virtual Reality 3D Video Glasses for 3.5" to 6" Smartphones The 3D Glasses are made of ABS and spherical resin lens materials without simulated plastic sheet that is friendly. The distance between the phone and the lens design can be adjusted so that it suits for people w/ different vision prescriptions. The distance between both lenses can also be adjusted. Suitable for 3.5~6 inch screen mobile smartphones. Personal images, other people cannot see anything except the wearer himself. Does not let light in, fully inmersive.Convenient to use: can watch at anytime, anywhere whether sitting, lying or standing. Reduced visual fatigue and dizzyness even after long use with the resin lens3D effect is very immersive and high quality thanks to the resin lenses. Supports left-right split screen 3D movies and videos. Full 3D, simulates very big screen. Support for both Android and IOS apps.