Product Description Features: This voltage regulator is used for motor speed control, and the output voltage can be adjusted via a precision multi-loop potentiometer. It is continuously adjustable from AC 0V to 220V, with zero hysteresis, zero delay, and ultra-high heat dissipation performance. It features multiple protection functions including surge protection, peak protection, and RC absorption. This device can be connected in series with lamps or household appliances, and then the knob can be rotated to adjust brightness, speed, voltage, and temperature. This product uses a new type of bidirectional high-power thyristor rectifier, with a current capacity of up to 100A, effectively solving the overcurrent problem caused by low resistance during the cooling process of heating elements. Specifications: Voltage: AC 220V; Maximum Power: 8000W (instantaneous power limitation for impeded loads; recommended power for extended use is 4000W or less); Voltage Adjustment Range: AC 0-220V; Circuit Board: FR-4 circuit board; Maximum Current: 100A; Dimensions: Approx. 6*6*4.5cm / 2.4*2.4*1.8 inches; Weight: Approx. 85g / 3oz. Usage: This voltage regulator can be connected in series in a circuit, or connected in series to lighting fixtures and appliances (i.e., the live or neutral wire of the lighting fixture or appliance is disconnected and can be connected to the terminals of this product). Simple and convenient operation. Package Contents: 1 x Voltage Regulator. Notes: 1. Do not adjust the voltage before connecting the load. 2. Some professional knowledge is required to use this product.