Specification: 100% and high quality Size: approx. 60 * 48 * 28 mm Input voltage: AC 220V The highest power: 2000W Voltage regulation: AC 50-220V Knob diameter: approx. 19 mm Epoxy copper clad thickness: approx. 1.6mm Feature: Control the speed of a brushed AC motor with this controller. High efficiency, high torque, low heat generating. With reverse polarity protection, high current protection. High temperature resistant FR - 4 circuit board. Fine workmanship and stable performance. Convenient to use. Durable in use. The use of new two-way high-power thyristor, because current up to 25 A, a good solution to the heating wire resistance in the case of cooling is too small to cause over-flow problem; able to easily adjust the electricity the output voltage between 0-220 volts, for use with electrical appliances. Such as: furnace, hot water heater tune, lamp dimmer, small motor, electric iron thermostat and so on. So as to achieve dimming, thermostats, pressure effect. Available for less than 2000W of electric power large appliances used because the power has been great, so the general home appliances or small factories sufficient. Package included:1 x 2000W Motor Speed Controller Note: Please allow 1-3mm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. _x000D_