SOLID-STATE CONTACTOR; POLARITY SWITCH; ADJUSTABLE GAS POST-FLOW TIMER; BUILT IN ADJUSTABLE HIGH FREQUENCY; SQUARE WAVE AC WELDING; LINE VOLTAGE COMPENSATION; SILICON CONTROLLED RECTIFIER; SEMI OR AUTOMATIC WELD PROGRAMMING; LED DIGITAL METERS; PRESETTING AMPERAGE FOR WELDING; 0 TO 10 VOLT REFERENCE; HEIGHT 47 1/4 IN.; WIDTH 24 IN.; DEPTH 22 3/4 IN.; WEIGHT 549 POUNDS