Feature:- 100% brand new high quality- Made of high quality materials, durable- When the output voltage is measured empty, it is a virtual voltage. It must be ed to a 20W or greater load to measure the correct output voltage.- The input is AC and the output is also AC, not DC. The above 4000W refers to the limit power when working under resistive load.- The inductive load is 1/3 of the resistive load. Resistive loads refer to inductive loads such as tungsten lamps or heating wires, which belong to series motors, etc., and should be used with caution in circuit board electronic products.- This product has a metal case and must be safely grounded.- 4000W high power motor fan variable thyristor electronic voltage regulator controller- Using metal shell structure, high temperature resistance, flame retardant, not easy to rust- The core chip adopts high-power thyristor- With adjustable knob for stepless voltage regulation- No delay, anti-surge, anti-spike, RC absorption multiple protection- With universal power socket and power light- With cooling port, fast cool downProduct parameters:- Input voltage: AC 220V- Output voltage: 0-220V (adjustable)- Adjustable voltage range: 0-220V- Maximum power: 4000W- Rated current: 9A- Maximum current: 18A- Weight: about 470g- Colour: Black- Plug specification: UK, US, AU, EU (optional)Packing list:1* Voltage Regulator (Optional)Notes:1. Due to various factors such as display brightness and light brightness, the actual color of the product may be slightly different from the website picture.2. Please allow a slight deviation between the data and the manual measurement.