Electric projection screen

Electric projection screen Product description Dinon Traditional Electric Screen A series - Advance ----Housing in white coat; ----Low-noise motor, 1 years warranty ----Luxury wireless remote control ----recommended for data and vedio projection; ----metal housing made of cool steel;Screen surface ----Screen surface on fabric base; ----Black border:L, R, T, B, stand for Left, Right, Top, Bottom; ----1:1 Size up to 240cm,Only 3cm for L & R; ----Size bigger than 240cm,Only 5cm for L & R; ----4:3 Size up to 240cm,3cm for L & R & B, 5cm for T; ----Size bigger than 240cm,5cm for 4sides; ----16:9 Size up to 240cm,25cm T and 3cm for L, R, B; ----Size bigger than 240cm,25cm T and 5cm for L, R, B; ----Size bigger than 300cm need to be weld by two pieces; ----Can be one piece but price will be much more expeansive.