100% brand new and high quality Features: Made of high quality material, solid, durable, high temperature resistance, flame retardant, not easy to rust. Special designed for helping you to control the fan speed, light brightness, motor speed and so on. It adopts core chip adopts high power thyristor, with adjustable knob for stepless voltage regulation . No delay, anti-surge, anti-spike, RC absorption multiple protection, save to use. With universal power socket and power supply light for more convenient use. With heat dissipation port for fast heat dissipation. Great for large household or small industrial electrical appliances of which power is less than 4000W. Specification: Material: Metal Input Voltage: AC 220V Output Voltage: 0-220V Adjustable (It won't work then the voltage is lower than 5V) Limited Power: 4000W Voltage Adjustment Range: 0-220V adjustable Rated Current: 9A Limited Current: 18A Optional Current: 3A/36W; 6A/72W Size: app.11.3 x 9.8 x 6.2cm/4.45 x 3.86 x 2.44in Color: Black Quantity: 1 Pc Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x Electronic Voltage Regulator