Features: This is a easy-to use voltage regulator for controlling light brightness or speed. Designed with large heat sink for better heat dissipation. Convenient to use, simple connection and rotate knob to control voltage. It can be used as power supply for large electrical devices of less than 10000W, enough for household appliances or for small factory. 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. Specification: Maximum. Power: 10000W (For long time use, please keep it in 6000W for resistive load) Working Voltage: AC 220V Adjusting Voltage: AC 10~220V Weight: 181g / 6.4oz (approx.) Package list: 1 x Voltage Controller Note: 1. It can not replace electric bicycles' battery charger, nor drive electric appliances which use switch power supply (such as 110V TV, speaker, refrigerator, air conditioner, rice cooker with a computer), and cannot drive induction cooker, energy saving lamp. 2. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering 1、This is a easy?to use voltage regulator for controlling light brightness or speed. 2、Designed with large heat sink for better heat dissipation. 3、Convenient to use, simple connection and rotate knob to control voltage. 4、It can be used as power supply for large electrical devices of less than 10000W, enough for household appliances or for small factory. 5、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.