It is a kind of beautiful high quality SCR voltage power regulator, worry-free regulation, help to adjust speed, temperature, voltage and light. Adopt high temperature resistant FR-4 circuit board, originally imported SCR chip, full thermal aluminum fin, with precision high voltage capacitor resistance. Separate switch control, freely control input power and cut off power. Not without delay and postpone, with a peak voltage absorb circuit, can protect the SCR high power effective. You can try.Specifications:Name:SCR voltage regulatorModel:NHT-4000WMaterial:aluminumColor:blackInput voltage:AC 220VOutput voltage:0-220VMaximum power:4000WVoltage adjustment range:0-220VRated current:9AMax current :18A Main Machine Size:115 * 100 * 83mm / 4.53 * 3.94 * 3.27inItem Weight:459g / 1.01lbPackage Size:180 * 100 * 115mm / 7.09 * 3, 94*4.53inPackage Weight522g / 1.15lbFeatures:1.Small:Mini size, portable power and lightweight, sturdy, easy to use.2.Worry-free regulation:High power SCR voltage regulator, worry-free regulation, help adjust speed, temperature, voltage and light.3.Well inside:Adopt high temperature resistant FR-4 circuit board, originally imported SCR chip, full thermal aluminum fin, with precision high voltage capacitor resistance.4.Convenient:Separate switch control, freely control input power and cut off power.5.Good Protection: Not without delay and postpone, with a peak voltage absorb circuit, can protect the SCR high power effective. Anti surge, anti-spike, RC absorb and multiple protection.6.A long life:Flame retardant and insulating outshell, high temperature resistant, rust resistant, high pressure counter and fine durability.7.High security:Adopt multi-functional industrial sockets, link copper parts design, with well contact and safety.8.Humanized installation: Humanized installation hole design, keep surface flat or hanging it is decided by yourself.9.A wide range of use:Quiet work, energy saving, stable anti-noise, and with a wide range of use. electric welding and etc.. Notes: When measuring the output voltage when it is 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 supply input, the output is also AC, DC no.Above mentioned refers to 4000W the ulti mate power when the 'we work under a resistive load. The inductive load is 1/3 of the resistive load. Resistive load means than inductive load, such as tungsten filament lamp or heating wire is series motor excited, etc., and printed circuit board electronic products are used with care. This product is a metal enclosure and must be safely grounded.Package List:1 * SCR Voltage RegulatorName:SCR Voltage RegulatorModel:NHT-4000WMaterial:AluminumColor: BlackInput Voltage: AC 220VOutput voltage:0-220VMaximum power:4000WVoltage adjustment range:0-220VRated current:9A Max current:18AMain machine size:115 * 100 * 83mm / 4.53 * 3.94 * 3.27inItem weight:459g / 1.01lbMachine size: packing:180 * 100 * 115mm / 7.09 * 3.94 * 4.53inPackage weight522g / 1.15lb