Brateck Manual Projector Screen 2.0x1.5m 4:3 ratio Self lockingThe Auto lock Manual Projection Screen PSBC100 is perfect for education, commercial presentations or residential home cinema. This auto locking system with dual wall and ceiling installation design provides variable height settings in any position. The screen lanyard for easy operation included allows screen\"s pull down handle to be reached from high areas. Black backed screen material eliminates light penetration for superior color reproduction.