4000W AC Variable Voltage Controller Control For Fan Speed Motor Tool Features: Using the new two-way high-power thyristor, current up to 40A, a good solution to the problem of over-current electric wire in the case of cooling the resistance is too small to cause. For electric power is less than 2000W of large electrical appliances , so the general home appliances or small factories are enough e. Gently rotate knob cap, can adjust flexibly, do not need to add any element, the product is practical, convenient.  Specifications: Output voltage: AC 0-220V Maximum power: 4000W(Note that this is short-time limiting power ) Size:100 * 85 * 53mm/ 3.94* 3.35 * 2.09 inch Weight: 450g Usage: Package Included: Use Note: 2. The input is AC, the output is also AC, DC does not support 3. Product power 4000 refers to the limit power when working under limit load 4. Adjustable devices are: Motors: fans, exhaust fans, ceiling fans, snail fans, and other fans without capacitors Heating categories: electric heating wire, electric heating fan, kettle, electric heating pot, heating rod, etc. Dimming type: tungsten filament lamp Power tools: angle grinders, electric screwdrivers, hand drills, chainsaws, etc. 5. Does not support adjustment: Electronic products with circuit boards are not supported, single-phase motors, washing machine motors, dual-value capacitor motors, asynchronous motors, water pumps, negative pressure fans, and centrifugal fans are not supported. 6. Use power: 4000w governor The resistive load is recommended to be within 2000w, and the inductive load is within 1800w The resistive load of the 10000wi governor is recommended to be within 4000W, and the inductive load is within 3800W. Note: 1. Voltage can be adjusted only under load conditions. 2. Partial line of the module back side is treated with copper. The customer of the large current application should tin plating  according to the need.