Center Rolling Shutter Motor 1.Max.Door Weight:250kgs 2.Spring balance and drum help 3.Aluminum alloy shell 4. DC 24V ROLLER DOOR OPERATOR, ROLLING DOOR MOTOR ,ROLLING SHUTTER MOTOR Specification ModelVoltageFrequencyPowerWorking SpeedMax. LoadBattery Spec.Max. Door AreaPR-ZA01Bbattery backupAC 220V±10%DC 24V50~60Hz100W0.20M/S250KGS12V / 2.8A *218 SQ.MPR-ZA01AC 220V±10%DC 24V50~60Hz100W0.20M/ ...