High-tech light-speed LCD shutter technology, compatible with 3D LCD projector, like Epson, Sony; (Note: can't used for all 3D DLP Projectors) Bluetooth signal transmission, compatible with Sony/Panasonic/Samsung/Sharp 3D Active TVs Super high refresh rate, high contrast and brightness, providing vivid 1080P Full HD 3D viewing experience as you want. Built in rechargeable battery for added convenience, Charge 2 hours, can work for approximately 60 hours; Auto power off function, energy efficiency. Super Soft, Durable, and Foldable bracket, Lightweight, suitable for all age groups and offering you a comfortable wearing experience.