If your projector attached to the ceiling and it is not the intention of moving, overhead screens will be the best choice for you. The manual screens are similar cornices,The difference is that they need to use to open and shut the unknown, an electric motor is intended to do.Open and closed the curtains of this type using the remote control or control the blinds will be installed on the wall The use of this type of screens for meeting rooms, amphitheater and home cinema recommended. * Electric blinds in sizes 180 x 180 Scope SCOPE *, 2 * 2, 2.5 * 2.5, 3 x 3, 3 x 4, 4 x 4, 4 x 6