"No gas is needed." Voltage input: 1-220–240V 50/60 Hz is the frequency. Current output: 30-130A Duty cycle: 40% Voltage at no load: 33V Integrated wire feeder Size of flux-cored wire: 0.8/0.9 mm One unit of 0.45 kg, 0.9 mm flux-core wire One earth clamp per cable unit enclosed in a carton box.