Adopted igbt modules and inverter technology, can effect ac tig welding, dc tigWelding, mma welding,etc. Especially used to weld aluminum.Specification:Input voltage: 220-240v,50/60hz,1phaseNo-load voltage:60-80vArc satrt mode: hf ignition1.for tig welding:Current range: 20-200ampDuty cycle: 35% at 200ampGas post flow time:1-25sec.Pre-gas time:0-10sec.1). For ac tig weldingSp%(balance): 30-70%Ac square wave freq.: 20-100hz, 250hz is optional2). For dc tig welding:Current range:20-200ampDuty cycle: 35% at 200amp2. dc mma welding:Current range: 5-160ampDuty cycle: 35% at 160ampNet weight: 25kgs