1 Streamline aluminum alloy case, indurative and durable, can be used in manual or electric way. 2 The surface of the screen is more valuable metal coating, high gain , offers clear and vivid projected picture. 3 Fog resistant, oxidation resistant and flame retardant. The screen surface can be washed. 4Gain:4.0-6.0 5 View angle:30 degree 6 Size:60*-150*,we can produce according to your demands 7Motor style: 110-240VAC 50/60Hz, synchronous motor or tubular motor ,Obtained CE Certifecate, passed LVD and EMC Testing.