The Shenzhen Oriental Long Technology Co., Ltd.: the United States as the projection screen: Grandview has the world before a bit production technology and a stylish and elegant design, stability and security in line with the world standard, the Americas, "UL", European CE international certification mark, the United States as a comprehensive inspection standards. This means that the user's use of safe and reliable, and contentment. A curtain production: BC, Canada, curtain and accessories all imported and domestic assembly. 2, the curtain: the United States as the bead curtain, white plastic curtain curtain base professional glass fiber random rules mesh woven its expansion rate of only 1%. While the the general chemical fiber curtain retractable rate up to 33%, so the use of glass fiber curtain, more smooth, not easily deformed, longer life. 1) glass bead curtain: Use tiny professional young beautiful crystal beads, breakthrough anti-static dust removal technology, a new international popular technology design. At the same time the use of advanced technology of electrostatic adsorption, five-story special material special adhesive treated immature beads evenly adsorbed on the surface of the cloth, the reflective brightness increase, text, images and data by the bright and delicate. Enhanced the reflex viewing angle, the full curtain up to 2.8 times as high gain, and the best viewing angle of 70 degrees, to help you achieve the true sense of the real, fresh visual feast. Bead curtain for a long time does not fade, no yellow, no distortion, no smell, anti-wrinkle, fire-retardant. The United States as the Emperor Karl intelligent electric bead projection screen 120 inch 4:3 parameters curtain type electric curtain curtain material bead open the way wireless remote control / wall-the manual electric mode installation, lifting Specifications 120-inch diagonal 4:3 ratio - projection The area size mm 2340 × 1755 Viewing Angle 160 ° appearance parameters the shell Total length mm 2631 curtain expand the total height mm 2006 applicable environmental conference room, lecture hall, training rooms, teaching