GOOGLE CARDBOARD; is a remarkable experience of 3D VR Glasses. It’s made with AAA grade corrugated paper which is the strongest material, which is the highest quality for this price., COMPATIBILITY; these VR glasses are for all 3.5″- 6.0″ smartphone screens. Whether your phone is an Android or iOS systems, you can use the Funsparks VR Glasses to watch 3D movies on Video Player and play a big variety of VR games., EXPERIENCE HIGH QUALITY 3D; use high resolution smartphones. Sense a truly amazing VR experience with cinematic HD visuals from your smart phone’s screen using the biconvex lenses offering a 37 mm focal length which is included in this package., ADVANCED GOOGLE CARDBOARD; according to our customers experience and testing we added the strap., FITS ANY BUDGET; the perfect solution for Virtual Reality on a budget! Box-style package with good portability and easy to take anywhere.