Features:_x000D_ _x000D_ This voltage regulator is used for motor speed regulation and can adjust the output voltage through the precision multi-ring potentiometer. _x000D_ AC 0V-220V continuously adjustable, zero lag, zero delay, ultra-high heat dissipation. _x000D_ Anti-surge, anti-peak, RC absorption multiple protection. _x000D_ Connect this device with lamp or home appliance in a series connection, then rotate the knob for dimming, speed, voltage, temperature control. _x000D_ This item has new two-way large power silicon controlled rectifier and the current can be up to 100A, which is a good solution to over-current of electric stove wire caused by low resistance during cooling. _x000D_ _x000D_ Specification: _x000D_ Voltage: AC 220V_x000D_ Maximum Power: 8000W (instantaneous limit power for impedance load; for long time use, 4000W or lower is recommended)_x000D_ Voltage Regulation: AC 0-220v_x000D_ Circuit Board: FR-4 circuit board_x000D_ Max. Current: 100A_x000D_ Size: Approx. 6*3.7*4.5cm/2.4*1.5*1.8inch_x000D_ Weight: Approx. 92g/3.2oz_x000D_ _x000D_ Use method:_x000D_ 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._x000D_ _x000D_ Package List: _x000D_ 1 x Motor Speed Controller_x000D_ _x000D_ Note: _x000D_ 1. You can't adjust voltage before connecting the load._x000D_ 2. You need some professional knowledge to use it.