Products are mainly used for resistive load (such as wire, soldering iron, heater, 220V drill with brush, electric fan, fan, blower, incandescent lamp, halogen lamp, iodine tungsten lamp, etc.), energy saving lamp, LED light. Features: Can play dimming, thermostats, pressure effect. 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 design maximum current can reach 20A. A good solution to the problem of over-current electric wire in the case of cooling caused by the resistance is too small, can easily adjust the output voltage between AC0V to AC220V. Specifications: Input voltage: 220V Adjustable voltage range: 0-220V Max power: 4000W Main color: silver Item size: 85 * 58 * 38mm / 3.3 * 2.3 * 1.5in Item weight: 130g / 4.6ounce Package size: 90 * 60 * 40mm / 3.5 * 2.4 * 1.6in Package weight: 135g / 4.8ounce Package List: 1 * Voltage Regulator