1 The screen surface can stay discretional position because of advanced autolocking system. it is easy to operate. 2 Fabric imported from U.S.A, high gain, which can let you enjoy clear and vivid picture on the screen. 3 Streamline aluminum alloy cover has two colors-silvery and white-at your choice. 4Gain:glassbeaded(2.5),mattewhite(1.1) 5 View angle:glassbeaded(35 degree),mattewhite(55 degree) 6 Size:60*-150*,we can produce according to your demands