Features 1、This voltage regulator is used for motor speed regulation and can adjust the output voltage through the precision multi-ring potentiometer. 2、AC 0V- continuously adjustable, zero lag, zero delay, ultra-high heat dissipation. 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. Specification 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*3.7*4.5cm/2.4*1.5*1.8inch Weight: Approx. 92g/3.2oz Use method: Package List: 1 x Motor Speed Controller Note: 2. You need some professional knowledge to use it. Package List