Perlity 3D VR Glasses 3d vr virtual reality Movie Game For IOS, Android with 3 - 6 inch Screen Complete Kit with NFC, Head-strap, pre-built and assembled in seconds. The perfect solution for Virtual Reality on a budget! Easy to assemble. With Printed Instructions and easy to follow numbered tabs. Biconvex lenses 25mm in diameter and Focal length 45mm (exact Google Cardboard specification) Made from High Quality, Hard-Wearing Cardboard