Features Precise Voltage Control: Easily adjust the output voltage from 0V to 220 V using the precision multi-ring potentiometer, providing precise control for motor speed and other applications. Ultra-High Heat Dissipation: Zero lag and zero delay design, ensuring efficient heat dissipation for long-term usage without overheating, providing reliable performance. Comprehensive defend: Features anti-, anti-peak, and RC absorption multiple defend, safeguarding connected devices from voltage fluctuations for peace of mind. Versatile Application: Connect in a series with lamps or home appliances and use the knob to control dimming, speed, voltage, and temperature, offering versatile control for various applications. High Power Silicon Controlled Rectifier: Equipped with a new two-way large power silicon controlled rectifier, capable of handling currents up to 100A, providing a reliable solution for preventing over-current issues. Specification: Voltage: AC 220 V Maximum Power: 8000W (instantaneous limit power for impedance load; for long time use, 4000W or lower is recommended) Voltage Regulation: AC 0-220 V Circuit Board: FR-4 circuit board Max. Current: 100A Size: Approx. 6*3.7*4.5cm/2.4*1.5*1.8inch Weight: Approx. 92g/3.2oz Use method: The voltage regulator can be used in the circuit in series, and the voltage regulator can be connected to the lamp and electric appliance in series (that is, either the lamp or electric appliance can be disconnected from the fire line or zero line, which can be connected to the terminal of the "product"). Simple and convenient operation. Package List: 1 x Motor Speed Controller Note: 1. You can't adjust voltage before connecting the load. 2. You need some professional knowledge to use it. Package List