This is a Sony 3D Personal Viewer. It is a headset which utilizes 2x OLED screens giving a virtual 150inch 3D screen.The picture is a far richer more immersive 3D experience. This unit can be hooked up to anything with a HDMI input and accepts optical audio also. It has 5.1 surround headphones attached. It is comfortable and lightweight and is adjustable for the perfect fit. This unit has had light use and is in exceptional condition complete with everything it came with in the box. This thing is awesome for Gaming Computers Movies and TV.