... the electric arc stability,high frequency stability without ,arc. AC/DC square-wave add pulse current,excellent welding technology, ... way,change a product,performance is extremely superior. DC/AC handmade welded pulsed tig function multi-usage. High-quality ... Features & SpecificationFunctionWSE-200WSE-250WSME-315Power Supply (V)AC 220V ± 15%AC 220V ± 15%AC 380V ± 15%Frequency(HZ)50/6050/6050/60Rated ...