1. Mini size, portable and , strong power, easy to use. 2. High power SCR voltage regulator, stepless regulation, help adjust speed, temperature, voltage and light. 3. Adopt high temperature FR-4 circuit board, chip SCR, full aluminum thermal fin, precisions resistance with high voltage condenser. 4. Separate switch control, freely control the input power and cut off power. 5. No postpone and no delay, with voltage absorb circuit. Flame retardant insulation outshell, high temperature , rustproof, anti high pressure and with fine durability. Adopt multi functional industrial sockets, thicken copper part design, with fine contact and safety. Humanized installation hole design, keep flat place or hanging on it is decided by yourself. Silent work, energy saving, stable anti noise, and with wide range of use. Suitable compatible with electrical components, such as: electric stove, water heater, heat fer lamp dimming, small motor, electric soldering temperature and etc. Name:SCR Voltage Regulator Maximum power:4000W Rated current:9A Maximum current:18A Main machine size:115x100x83mm/4.53x3.94x3.27in Item weight:459g/1.01lb Note: 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. Input AC power, the output is also AC, not DC. The above mentioned 4000W refers to the ulti mate power when working under resistive load. The inductive load is 1/3 of the resistive load. The resistive load means that the inductive load such as a filament lamp or a heating wire is a series-excited motor,etc.,and the circuit board electronic products are used with caution. This product is a metal case and must be grounded safely. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC 220V Colour:Black Material:Metal+Plastic Package Contents: 1 * SCR Voltage Regulator Onl