Products are mainly used for resistive loads (such as wire, soldering iron, heater, 220V drill with brush, electric fan, blower, blower, incandescent lamp, halogen lamp, tungsten iodine lamp, etc.), energy saving lamp, LED light. Features: Can play the dimming, thermostats, pressure effect. The output is connected to the electric wire or electrical appliances, rotary potentiometer, can play speed, pressure, thermostat. Using the new two-way high-power thyristor, because the maximum design current can reach 20A. A good solution to the problem of overcurrent electric wire when cooling caused by the resistance is too small, can easily adjust the output voltage between AC0V and AC220V. Features: Input voltage: 220V Adjustable voltage range : 0-220V Maximum power: 4000W Main color: silver Item size: 85*58*38mm/3.3*2.3*1.5in Weight Item: 130g/4.6oz Package Size: 90*60*40mm/3.5*2.4*1.6inch Package Weight: 135g/4 .8 ounces Package list: 1 * voltage regulator Sold by grid cool store