Product Description: WELDER AC and DC rolling door Motor is the latest developed rolling door Motor products, those products overcome the shortcoming of the DC Motor, it’s the ideal products for roller shutter’s opening and closing. Features: 1. Using DC motor, more stable operation, longer using life. 2. When the power comes, the power is supplied by transformer to motor direct. The batteries are not work until the power cut. 3. When the power is cut, the batteries will supply the power to the motor direct and make sure the door could be opened for at least 15 times.4. The batteries have automatic protection system when the battery voltage is too low and automatic charging system when power come. 5. Control box comes with remote control. Technical Parameter: TypeRated Power(W)Lift Weight(Kg)Max. Output Torque(N.m)Voltage(V)Rated Current(A)Roller Bore(mm)Chain No.WDKJ300-ZL41803002102203.114010AWDKJ400-ZL32104002802204.514010AWDKJ400-ZL42104002802204.514010AWDKJ500-ZL32405003502204.814010AWDKJ500-ZL42405003502204.814010A