M84NWV-SRM Manual Projection Screen has dual wall and ceiling installation design. It has slow retract mechanism which retracts slowly back into housing after releasing handle without the need to hold on to handle. MaxWhite screen material is durable and easy to clean. Screen lanyard for easy operation has screen's pull down handle to be reached from high areas. It has standard 4-side black masking borders and black backed screen material which eliminates light penetration for superior color reproduction.