Products are mainly used for resistive loads (e.g., wire, soldering iron, heater, 220V brush motor, electric fan, fan, fan, incandescent lamp, halogen lamp, tungsten-iodine lamp, etc.), energy-saving lamps, LED lamps. Features: Can perform dimming, thermostat, and pressure regulation functions. The output is connected to the electrical wiring or power of appliances. By rotating the potentiometer, you can adjust speed, pressure, and temperature. Featuring a new bidirectional high-power thyristor, the maximum design current can reach 20A. This effectively solves the problem of overcurrent in electrical wiring during cooling failures caused by low resistance, allowing easy adjustment of 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 Item Weight: 130g / 4.6oz Package Size: 90 * 60 * 40mm / 3.5 * 2.4 * 1.6in Package Weight: 135g / 4.8 oz Package List: 1 * Voltage Regulator