[Usage]: This voltage regulator is used for motor speed regulation and can adjust the output voltage through the precision multi-ring potentiometer [Usage]: This voltage regulator is used for motor speed regulation and can adjust the output voltage through the precision multi-ring potentiometer [Easy Operation]: Connect this device with lamp or home appliance in a series connection, then rotate the knob for dimming, speed, voltage, temperature control [Working Performance]: This motor speed controller adopts high-quality SCR, resistance to high temperature and high voltage, and the max current is up to 25A [AC Motor Speed Controller]: This AC voltage regulator can be used to control AC motor speed, AC light and heating wire temperature Specifications: color: as show Voltage: AC 220V Maximum power: 2000W Voltage regulation: AC 50-220v Circuit board: FR-4 circuit board Withstand voltage: Max. 1200 volts/current 25A Size: 5.5 x 5cm /2.17 x 1.97in Weight: 42g Package included: 1 x Motor Speed Controller