Detailed Product Description 1, The particular auto locking system keeps the screen smooth and flat, ... 2, High quality fabric offers clear and vivid image. 3, the alloy or steel tripod is stable, nice ... and convenient to move 4. Gain: glass beaded (2.8), matte white ( ... ), matte white (55 degree). 6. Model: 1:1or 4:3 format can be chosen, we can produce according to your ...