The Telwin Welding Machine TECHNOMIG 210 DUAL SYNERGIC Description: Polarity reversal for GAS MIG-MAG/BRAZING Welding Machine; 17 synergy curves available; Visualization on LCD display of voltage,current, Welding Machine speed; Regulation of: wire speed up slope, electronic reactance, burn-back time, post gas; Choice of 2/4 times, spot operation; Thermostatic, overvoltage, undervoltage, overcurrent, motorgenerator protectionst.