1: This product is AC input, AC output, can only step down, connect to the load to adjust the voltage, no-load multimeter is useless, not a transformer, please buyers after reading all the instructions on the product page before buying!2: The voltage regulator is technically upgraded again, and the voltage regulation range can be smoothly adjusted from 10V-220V, which is more suitable for industrial enterprises that require low-voltage driving heating wires: such as cutting styrofoam, pearl cotton, raincoat production, etc.3: This product cannot replace the battery charger of electric vehicles, nor can it drive electrical appliances that use switching power supplies (such as 110V televisions, stereos, refrigerators, air conditioners. Electric cookers with computers), nor can they drive induction cookers and energy-saving lamps.4: SCR is mainly used for resistive loads (electric heating filament incandescent lamps, etc.). Most single-phase AC motors are also available, but they are not guaranteed. For other types of loads, please confirm by the buyer. The fuse has a response time. If the current is too large, in addition to the fuse, the module may also be burned out.5: Using a new type of bidirectional high-power thyristor, the limit current can reach 100A, which solves the problem of overcurrent caused by too small resistance of the electric furnace wire under cooling; it can easily adjust the output voltage of the mains , Adjust arbitrarily between 0-220v for electrical appliances. Such as: electric stove, water heater heat adjustment, lamp light adjustment, small motor speed adjustment, electric soldering iron temperature adjustment, etc. So as to achieve the effects of dimming, temperature and pressure. Description:Workingvoltage:AC220VRegulationvoltage:AC110-220VMaxpower: 2000W4000W 5000W 6000W 10000W(resistiveload)