... 120",150",180",200" 3.Matte White/Glass Beaded Sunking Electric Projection Screen with Control System1. Format:4:3 or 16:9 ... system5, Suit for R232 and RF control systemThe Electric Projection Screen is widely used in the fields of multi-functional conference rooms, multi ... Guangzhou Tiandi Audio & Visual Equipment Co., LtdFor more Projector screen, pls contact us directly Electric Projection Screen