Advanced inverter technology, high working efficiency. Multipoint overheat protection, with good protection of undervoltage and over current. Instantaneous arc starting with small current welding. With 24T/4T working mode, smart operation. The frequency, duty ratio and valley current can be adjusted freely under Pulse function. AC and DC dual use, available DC finction for welding stainless steel, alloy steel, carbon steel, copper and other nonferrous metals, AC function can also be used on aluminium and aluminium products. Using to-times inverter technology, Pure Squra Wave output, high quality arc performance, heat concentration, strong reverse, cleaning ability, wide range of clean-up, small current is hard to break arc characteristics, guarantees excellent welding characteristics. Switch indication visuable, high integration and simplified circuit. Able to weld all kinds of metal, such as, aluminium and alumunium alloy, carbon steel, stainless steel, alloy steel, etc.