TIG welder is of constant current external characteristic. Welding current will not be changed per arc length but being kept at a very stable level. It adopts PWM technology and high-power switching element IGBT (discrete) to rectify AC120V/AC240V (50Hz/60Hz) voltage to DC340V, after inverting it to 42KHz, there is a voltage step-down and rectification again, stable welder current is obtained by output current feedback and adjustment. 
MCU digital control achieves intelligent synergy4 
Latest IGBT Inverter Technology 
TIG205Pro is DC-TIG、MMA and Cold-TIG Multi-Process welding machine 
MMA/Stick welding features: hot start, arc force and anti-stick 
TIG welding features: 2T/4T Operation, current regulation, post-flow adjustable, down-slope 
Fan-On-Demand power source cooling system operates only when needed, reducing noise, energy use and the amount of contaminants pulled through the machine 
Compact and portable with light weight 
Safety protection: over current/overheating protection circuit 
Unique Design & LED Display Panel, read data more clear, concise distribution and convenient operation. Warning indicator for normal working and abnormal working 
Remote control function available: support foot pedal & analog torch (purchase additional if need)