120" HD Projector Screen 1080P 4:3 ELECTRIC 3D PROJECTION SCREEN + REMOTE 1. Dual wall and ceiling installation design.Self- locked system provides variable height settings. 2. 4:3 screen format and diagonal 120" offers 150cm X 266cm viewing area. 3. High contrast 2.5-2.8 gain screen optimizes picture quality. 4. Matte white viewing surface diffuses projected light uniformly. 5. 4-side black masking borders increase picture focus & contrast.