It places two tiny OLED (Organic Light Emitting Diode) screens, one in front of each eye, each with individual focus controls and diopter adjustments to create the illusion that you are watching one enormous screen. But this device is the size of a pair of sunglasses - a fairly ugly pair of sunglasses it has to be said, but almost as portable and compact. There’s even a pair of in-ear headphones wired into the arms to complete the cocoon-of-entertainment effect.