Description: This is a easy-to use voltage regulator for controlling light brightness, speed or temperature. The big power voltage regulator is equipped with two-way silicon controlled rectifier, which is very convenient and practical. The voltage regulator has a large power and can be used for large household or small industrial electrical appliances of which power is less than 2000W(power should be reduced for inductance or capacitance loads). Features: This item has new two-way large power silicon controlled rectifier and the current can be up to 25A, which is a good solution to over current of electric stove wire caused by low resistance during cooling. Convenient to use, simply connect input terminals to either 220V wire(live wire or neutral wire) and output to load, then rotate knob to control voltage. With a wide voltage regulating range, the output voltage can be easily adjusted from 50V to 220V. Could be widely used as heat controller on electric stoves, water heaters, light dimmer on lamps, speed controller on small motors, or temperature controller on electric soldering iron, etc. This voltage regulator has wave voltage absorption circuit which can effectively protect large power silicon controlled rectifier and ensures a longer service life and durability. Specifications: Input Voltage: AC220V(NOT 110V) Max Power: 2000W Output Voltage: AC 50V to 220V Size: 48 x 35 x 28mm / 1.89 x 1.37 x 1.1" Package Includes: 1 x Voltage Regulator Note: The input voltage of this voltage regulator can NOT be 110V. .