Apply to the market, warehouse, garage, bingguan, plant and other buildings shutter door open, close, with electric and manual functions. It is the ideal accessory product of modern architecture. It is a symbol of the universal pursuit of efficiency. Product structure and functional features: The opening and closing operation of the electric drive shutter door is up and down stroke; Automatic control by limit switch, accurate and reliable positioning, open and close safety. Power failure, manual operation, convenient and labor-saving. The motor winding is equipped with overheating protection device, which can automatically cut off the power supply when the temperature reaches 110 degrees to keep the motor from being burnt out. When the temperature drops to 70 degrees, the device can be started again for use. Low noise, low vibration and low power consumption.