Features 1、Can play dimming, thermostats, pressure effect. 2、Output is connected to the electric wire or electrical appliances, rotary potentiometer, can play speed, pressure, thermostat. 3、Using the new two way high power thyristor, because the design maximum current can reach 20A. 4、A good solution to the problem of over current electric wire in the case of cooling caused by the resistance is too small 5、Mainly used for resistive load (such as wire, soldering iron, heater, electric fan, fan, blower, LED lamp, halogen lamp, etc.), energy saving lamp, LED light. Specification Specifications: Adjustable voltage range: 0-220 Maximum power: 4000W Main color: silver Item size: 85 * 58 * 38mm / 3.3 * 2.3 * 1.5in Item weight: 130g / 4.6ounce Package List 1 * Voltage Regulator