Input voltage compensation keeps welding parameters constant even when input voltage change±15%. Thermal overload protection automatically shuts down the power source to prevent high repair cost. Large digital volmeter and ammeters for easy viewing Adjustable weld stabilizer(high-low inductance)provide the flexibility to produce the optimal arc characteristics. Presettable welding voltage and current allows you to easily set weld output before welding Power efficiency gives exceptional value and return on you investment.