Able to change speed when running -Output From 6W to 120w -Range of speed adjustment is (50Hz)90~1400, (60Hz)90~600 -Wiring has separate or compose types to choose -Gentry start or stop function is attach with separate type Insulation resistance : Use a DC500V high resistance gauge to measure the coil of motor and it's a outer shell when motor running in normal temperature and normal humidity, its value should be above 100MΩ Insulation pressure endurance : Apply 60Hz, 1.5kV at the coil of motor and it's a outer shell for one minute without and extraordinary phenomenon when motor running in normal temperature and normal humidity. Temperature arise : Install two reduction gears or radiation plate of the same class at the motor. After rated running, test the coil by resistance method. Its value should be less than 80°C. Insulation Class : Class B (130°C) Overheat protection : Over heat shut down system. (If extra protection with overheat is needed please specify when ordering.) Environment temperature : -10°C～+50°C Humid around the environment : Below 85% (No frosting happen)