1、This voltage regulator is used for motor speed regulation and can adjust the output voltage through the precision multi-ring potentiometer. 2、AC 0- 8000W AC Motor Speed Controller Voltage Regulator LED Dimmers 3、Anti-surge, anti-peak, RC absorption multiple protection. 4、Connect this device with lamp or home appliance in a series connection, then rotate the knob for dimming, speed, voltage, temperature control. 5、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. Features: Anti - surge, anti - peak, RC absorption multiple protection. 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. Specification: Maximum Power: 8000W (instantaneous limit power for impedance load; for long time use, 4000W or lower is recommended) Circuit Board: FR-4 circuit board Max. Current: 100A Size: Approx. 6*6*4.5cm/2.4*2.4*1.8inch Weight: Approx. 85g/3oz Use method: Package List: Note: 2. You need some professional knowledge to use it.