I AM CARDBOARD&reg; EVA Foam Version 45mm Focal Length Virtual Reality Viewer Inspired by Google Cardboard (WITH NFC) - COLORED EVA Version. Made sturdier with EVA Foam material. NOTE: This will be ship out to you in random color pattern. Complete Kit with NFC in stylish packaging. Comes with easy to follow step by step assembly instructions. Great for gift. Compatible with iPhone 6, Samsung Galaxy S5, Samsung Galaxy S4, Moto X, Nexus 4, Nexus 5 and Samsung Galaxy Nexus. Biconvex lenses 25mm in diameter and Focal length 45mm (exact google cardboard specification) Comes with an stretchable head strap.