The Manual SRM series front projection screen has a special built-in Slow Retract Mechanism to allow a safe and quiet return to the screen's housing.Elite Screens’ MaxWhite Screen Material is durable for daily use and easy to clean. It has a wide viewing angle with 1.1 Gain and is suitable for most applications including Commercial /Educational and Residential. MaxWhite Screen material has a black backing to eliminate light penetration for superior color reproduction. Its Texture pattern eliminates Moiré or Hot Spotting which is a common phenomenon with poorly made projection screen material or wall projections.