Features: _x000D_ AC 0V-220V continuously adjustable, zero hysteresis, zero latency, superior heat dissipation. _x000D_ Can be used in many places, such as: furnace, hot water heater tune, dimming lamps, small motor speed, electric iron thermostat and so on, so as to achieve dimming, thermostats, voltage regulating effect. _x000D_ 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. _x000D_ For electric power is less than 2000W of large electrical appliances , so the general home appliances or small factories are enough to use. _x000D_ Gently rotate knob cap, can adjust flexibly, do not need to add any element, the product is practical, convenient. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Input voltage: AC 220V _x000D_ Output voltage: AC 0-220V_x000D_ Maximum power: 4000W(Note that this is short-time limiting power ) _x000D_ Size:100 * 85 * 53mm/ 3.94* 3.35 * 2.09 inch _x000D_ Plug: CN plug _x000D_ Weight: 450g_x000D_ _x000D_ _x000D_ _x000D_ Usage: _x000D_ Voltage controller and desk lamp, electrical appliances are connected in series in the circuit (namely, disconnect any one of the neutral wire or live wire of the desk lamp, electrical appliances, pick up on the voltage controller terminal ), turn the knob cap, can adjust the light, speed, temperature,voltage regulating; simple and convenient operation. _x000D_ _x000D_ _x000D_ Package Included: _x000D_ 1 x Variable Voltage Controller _x000D_ _x000D_ _x000D_ Use Note:_x000D_ 1. The output voltage measured at no-load is a virtual voltage, and it must be connected to a load of more than 20W to measure the correct output voltage_x000D_ 2. The input is AC, the output is also AC, DC does not support_x000D_ 3. Product power 4000 refers to the limit power when working under limit load_x000D_ 4. Adjustable devices are:_x000D_ Motors: fans, exhaust fans, ceiling fans, snail fans, and other fans without capacitors_x000D_ Heating categories: electric heating wire, electric heating fan, kettle, electric heating pot, heating rod, etc._x000D_ Dimming type: tungsten filament lamp_x000D_ Power tools: angle grinders, electric screwdrivers, hand drills, chainsaws, etc._x000D_ 5. Does not support adjustment:_x000D_ 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._x000D_ 6. Use power:_x000D_ 4000w governor The resistive load is recommended to be within 2000w, and the inductive load is within 1800w_x000D_ The resistive load of the 10000wi governor is recommended to be within 4000W, and the inductive load is within 3800W._x000D_ _x000D_ _x000D_ Note: _x000D_ 1. Voltage can be adjusted only under load conditions._x000D_ 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.