Changeable arms, water-cooled transformer, complete with footswitch and air FRL, compact, light weight, microprocessor based and electronic controller; input voltage - 415 V; type of guns - C-type, scissor type, etc; operation - pneumatic; air consumption for 100 operations - 520 ltr; power control - SCR; weight of transformer - 150 to 250 kg; and weight of welding gun - depends on type from 20 kg to 40 kg.