1 synchronous or tubular motor runs quietly, and equipped thermal protection system in order to last using time of motor 2 Very good quality fabric, high gain, which can let you enjoy clear and vivid picture on the screen. 3 Wireless or infare remote controller is optional, and changes the traditional way, which makes operation is easy. 4Gain:glassbeaded(2.5),mattewhite(1.1) 5 View angle:glassbeaded(35 degree),mattewhite(55 degree) 6 Size:60*-400*,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.