... * RF are available,changing the traditional control ways,which makes it easy to operate. * Motor: synchronous ... down,smoothly. "* Easy to install and operate,be fit be unlike field need,such as :The institute,business ... 2.8. Matte White:Screen surface can be cleaned,flame retardant,Mildew resistant,Viewing angle is ... 1.2. HD gray:Screen surface can be cleaned,flame retardant,Mildew resistant,Viewing angle ...