Complete Kit with NFC, Head-strap, Kraft Cardboard, pre-built and assembled in seconds. 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) Your best option for virtual reality on a budget. BIGGER VERSION. For 5-inch to 5.7-inch screen size. Perfect fit for Samsung …