Format 4:3 ,blank thickness 0.3 mm ,Viewing degree 120 ° ,gain factor 1 times projection screen size ,Tubus length 266.6 cm ,Width 236 cm ,Height 177 cm ,width 266.6 cm ,depth 8.9 cm, Mount permanently to wall or ceiling ,- Mount on an aluminium profile ,- Operate motorized ,- Easy to unwind or rewind to the desired position