This is a kind of beautiful high quality SCR voltage power regulator, worry-free regulation, help adjust speed, temperature, voltage and light. Adopt high temperature resistant FR-4 circuit board, original imported SCR chip, full aluminum thermal fin, precision resistance high voltage capacitor. No delay and postponement, with peak voltage absorb circuit, can protect the high power SCR effective. You can try. Features: Mini size, portable and lightweight power, sturdy, easy to use. High power SCR voltage regulator, worry-free regulation, help adjust speed, temperature, voltage and light. Adopt high temperature resistant FR-4 circuit board, original imported SCR chip, full aluminum thermal fin, precision resistance high voltage capacitor. No delay and postponement, with peak voltage absorb circuit, can protect the high power SCR effective. Anti-surge, anti-spike, RC absorber and multiple protection. Flame retardant and outshell insulation, high temperature resistant, rust resistant, high pressure against and fine durability. Adopt multi-functional industrial sockets, link copper parts design, with good contact and safety. Humanized installation hole design, keep flat surface or hung it is decided by yourself. quiet work, energy saving, stable anti-noise and with a wide range of use. Suitable for water heater, tungsten lamp, small motor, electric iron and etc.. Remarks: When measuring the output voltage when empty, it is a virtual voltage. It must be connected to a load of 20W or more to measure the correct output voltage. AC power input, output is also AC, DC no. Mentioned above refers to 4000W the ultimate power output when working under a resistive load. The inductive load is 1/3 of the resistive load. The resistive load means than inductive load, such as tungsten filament lamp or heating wire is excited series motor, etc., and electronic products circuit board are used carefully. This product is a metal enclosure and must be safely grounded. Features: Name: SCR voltage regulator Material: aluminum Color: gray Input voltage: AC 220V Output Voltage: 0-220V Maximum power: 4000W voltage adjustment range: 0-220V Rated current: 9A Max current: 18A main machine size: 100*83*75mm/3.94*3.27*2.95in Item Weight: 418g / 0.92lb Package Size: 145*85*105mm/5.71*3.35*4.13in Package Weight: 450g / 0.99lb Package List: 1 * SCR voltage regulator