This is a kind of beautiful high-quality SCR voltage power regulator, worry-free regulation, helping to adjust speed, temperature, voltage and light. Adopt high temperature resistant FR-4 PCB, originally imported SCR chip, full thermal aluminum fins, with precision high voltage capacitor resistor. Separate switch control, freely control input power and cut off power. No delay and postpone, with peak voltage absorbing circuit, can effectively protect high-power SCR. You can try. Specifications: Name: SCR Voltage Regulator Model: NHT-4000W Material: Aluminum Color Black Input Voltage: AC 220V Output Voltage: 0-220V Maximum Power: 4000W Voltage Adjustment Range: 0-220V Rated Current: 9A Maximum Current: 18A Main Machine Size: 115 * 100 * 83mm / 4.53 * 3.94 * 3.27in Item Weight: 459g / 1.01lb Package Size: 180 * 100 * 115mm / 7.09 * 3.94 * 4.53in Package Weight 522g / 1.15lb Features: 1. Small: Mini size, portable and lightweight, sturdy power, easy to use. 2. Worry-free Regulation : High-power SCR voltage regulator, worry-free regulation, help to adjust speed, temperature, voltage and light. 3. Good Inside : Adopt high temperature resistant FR-4 circuit board, originally imported SCR chip, full aluminum thermal fins, with precision high voltage capacitor resistor. 4. Convenient: Separate switch control, freely control the input power and cut off the power supply. 5. Good Protection : No delay and postpone, with a peak voltage absorbing circuit, can effectively protect the high-power SCR. Anti-surge, anti-spike, RC absorb and multiple protection. 6. Long service life: Flame retardant and insulating agent outshell, high temperature resistant, rust resistant, high pressure against and fine durability. 7. High safety: Adopt multi-functional industrial sockets, link copper parts design, with good contact and safety. 8. Humanized installation: : Humanized installation hole design, keep flat surface or hang it is decided by yourself. 9. Wide range of use: Silent work, energy saving, stable anti-noise and with a wide range of use. Suitable for electrical components, such as: electric stove, water heater, gradual extinction heat transfer lamp, small motor, electric soldering temperature and etc.. Notes: When measuring the output voltage when it is no-load, 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, the output is also AC, not DC. Above mentioned refers to 4000W the ultimate mating power when working under a resistive load. The inductive load is 1/3 of the resistive load. The resistive load medium than the inductive load, such as a tungsten filament lamp or a heating wire is a series excited motor, etc., and the electronic products circuit board are used with caution. This product is a metal case and must be grounded securely. Package List: 1 * SCR Voltage Regulator