1This motor speed controller is mainly applicable in AC220/110V, 50Hz single circuit 2This AC motor speed controller is designed with small size, precision, wide rang of speed regulation 3Widely used in packaging, printing, food, electronics, instruments, medical devices, glasses machinery industry, production line speed regulating drive device 4This motor speed controller has single-phase capacitance starting and motor,micro gear reducer speed sensor, so form the integration of mechanical and electrical 5Motor speed controller has stable mechanical properties Features: This motor speed controller is mainly applicable in AC220/110V, 50Hz single circuit. This AC motor speed controller is designed with small size, precision, wide rang of speed regulation. Widely used in packaging, printing, food, electronics, instruments, medical devices, glasses machinery industry, production line speed regulating drive device. This motor speed controller has single-phase capacitance starting and motor, micro gear reducer speed sensor, so form the integration of mechanical and electrical. Motor speed controller has stable mechanical properties. Specifications: Model: SS - 22 Type: motor governor Input voltage: 220/240v Input speed: 1700 (RPM) Weight:160g Package included: 1 x Speed control unit 1 x Knob 1 x potentiometer 1 x nut 1 x washer 2 x black strip 1 x scale