1,Self-locking and reversible electromechanical gearmotor. 2,Body made in aluminium and quality painted. 3,Water-proof design. 4,Overheat and over -current protection. 5,Time-delay protection. 6,Emergency release key in case of Power fialure. 7,One plug-in remote receive with two transmitters. 8,one control unit for two motors,control panel are available to photocells,loop detector,IC card reader&alarm lamp. 9,easy installation,full fitting accessories are provided in motor kits. *************************************** Features: Model:K207A/K207U Power supply:220V~240V(50/60Hz)/110~120V(60Hz) Motor speed:1250rpm/1500rpm Opening time: <22 sec