Tigweld 250EX 250-Amp TIG Welder with Synergistic Controls Unit features high frequency start tig and includes a foot pedal for great tig welding control and operation Stick welder operates on 110-volt and 220-volt and is capable of welding 7018, 6013, and other stick welding electrodes Features pre-flow, post flow, and clearance effect (balance) function for greater welding control Great machine for the hobbyist or professional with an easy to use panel