Cloud Mountain Manual Projector Screen, 100-inch Diagonal 4:3 HD Matte White, Wall Mounted Ceiling Pull Down Manual Projector Screen with Auto Lock 1.3 Gain 100-inch Diagonal, 4:3 Aspect Ratio. Screen Size: 80.0" Wx60.0" H. 1.3 Gain,160 degrees viewing angle with no resolution loss. HIGHTLIGHT: Four side black borders enhance picture contrast. HOMMIZATION:features a 2-inch interval auto-lock mechanism that allow for carious height settings and a screen lanyard for easy pull down. Dual wall and ceiling installation design. Ideal for home theater, public display, business, classroom etc.