1) Good design, advanced structure, strong power. 2) Import electric component, security and credibility, small power consumption. 3) Motor operation smooth, easy fever, low vibration and noise, long service life. 4) Remote control. 5) Supply reserved power equipment, in the absence of power, the users can also operate the motors. 6) The battery is 4Ah/12V. 7) Safe voltage: 24V. Main Specifications and Technical Parameters Parameters Technical Parameters Voltage 220V/50Hz Power（W） 200 Lifting force(kg) 500 Output torque(N・m) 343 Output turn speed (r/min) 5 Max lifting height (m) 6 Max external diameter of door (m) 0.4 Chain No. 10A Weight of host motor (kg) 10.7