Features: 1)Our rolling door opener is used to control the rolling shutter door.Drive unit and mechanism systemare designed separately. The motor gear is also improved. The cover box effectively prevent from the dust. LED courtesy light replace the traditional bulb one so the power consumption is much lower and the control board is more reliable 2) With backup battery Rolling door opener RDO-5D Rolling door opener RDO-5D, Drive unit and control system together, Max lifting force 500N Specification:Power supply: 230V 50-60Hz Driving motor: 24V Absorbed power: 120W Continuous running: 20/h (under 30kg load) Running noise: <55db Min travellimit set: 300mm Max lifting force: 500N (50Kg) Protection grade: IP20 Auto close time: 3m Door travel speed: 16cm/s Max lifting height: 5000mm Temperature range: -20 55