1、Multi Functional Industrial Socket: The SCR electronic voltage regulator adopts multi functional industrial socket, and the copper parts are thickened. Thickened phosphor bronze fittings are used for the internal copper parts, with high current and good contact and safety. 2、Flame Retardant Metal Casing: The metal casing is flame retardant and does not deform at high temperature, metal painting and does not rust, effectively preventing high temperature and heavy pressure, and eliminating potential safety hazards. 3、Product Features: Zero hysteresis, zero delay, with peak voltage absorption circuit, effectively protect high power thyristor, anti surge, anti spike, multiple protection. 4、Wide Applications: Suitable for electric appliances such as electric stove, water heater, tungsten lamp, small motor, electric soldering iron, fan speed regulation, etc. 5、4000W High Power: Because the power is already very large, general household appliances or small engineering appliances are enough. 6、Scope of Application: This 4000W high power SCR electronic voltage regulator is applicable to any adjustment between 20 to 220 volts, Material: Aluminum, Silicon Color: As Pictures Shown Weight: Approx. 509g / 18.0oz Ultimate Power: 4000W (suitable for 2000W-3000W resistive load) Rated Current: 9A Limit Current: 18A 1 x SCR Electronic Voltage Regulator 1 x Manual