1.100% high quality 2. Small size, light to carry, powerful and easy to use. 3. High-power thyristor voltage regulator, stepless adjustment, helps to adjust speed, temperature, voltage and light. 4. Independent switch control, freely control the input power and cut off the power. 5. The shell is fireproof and heat preservation, high temperature resistant, rust proof, high pressure resistant and durable. Quiet work, energy saving, stable anti-noise, wide range of use. Applicable to electrical components, such as: electric furnace, water heater, heat transfer lamp dimming, small motor, electric welding temperature, etc. Input voltage: AC110-220V Output voltage: 0-220V Maximum power: 4000W Voltage adjustment range: 0-220V Rated current: 9A Maximum current: 18A Precautions and Instructions for Use 1. When the machine is empty, the measured output voltage is a virtual voltage, and a load of more than 20W must be connected to measure the correct output voltage. 2. Input AC, and the output is also AC, not DC. 3. The 4000W mentioned above refers to the limit power when working under resistive load. The inductive load is 1/3 of the resistive load. The resistive load refers to the tungsten filament lamp, heating wire, etc., and the inductive load refers to the series excitation motor. etc., use with caution in electronic products with circuit boards. 4. This product is a metal shell and must be safely grounded Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Plug Type: EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC 220V Colour:Black Material:Metal Package Contents: 2 x Motor governor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3c