4K ALR Tab-tension electric screen with Black colour aluminum housing. Ambient light-rejecting screen material made of PVC, which is coated with special anti-light material, which absorbs ambient light and lamp light. There is a layer of crystal in the middle of the surface, which effectively improves the brightness and contrast. Users are able to enjoy movies during daytime. The PVC material absorbs 90% ambient light effectively, making the image more real. Under ambient light, Black Crystal improves the contrast by 600% more than the normal Matte fabric. Tension ALR screen material is a classic cinema fabric, loved by movie fans. Works very well in bright rooms. Screen Material Features: Ratio: 16:9 Screen material Gain:0.8 View angle:160 degree Screen material Thickness:0.31mm Fabric material Feature: Super smooth Fabric material Colour: Dark grey Ambient light Rejecting Ability: Excellent Support: 4K,1080P, active 3D projectors Applicable projectors: Middle throw/Long throw – any kind of 3LCD, Laser, or DLP projectors The professional all-aluminum housing is both durable and attractive, Bottom rod is also aluminum material. Uses a high-speed silent motor, faster than the speed of the synchronous motor screen by 50%, with noise reduction down by 80% The shell housing has a manual/emergency control switch. Tab tension design, even when used for many years, the screen surface is still very smooth and flat as a mirror. Installation methods: Wall mounting Installation, Ceiling top mounting installation, Ceiling hanging installation. Professional packing solution to reduce the risk of transportation damage. Control Systems: Built-in High-end RF remote control (standard configuration) RF Remote control can be used within 30m range RE Remote control support:12V trigger interface dry contact 485 12V wire trigger (Optional) Two Connectors – 3.5mm connector is for the projector, 2.5mm connector is for the screen