new welding machine. ARC-140 series inverter DC/MMA welderCharacteristic ... steady welding current, reliable performance... Small DC arc welder uses scale trust control technology, single knob ... . No load waste less than 100W,compared with traditional welder,energy saving up to 50%. Invert ... 100KHZ, high speed of dynamic response, easy arc starting, steady arc, anti interference, low noise, small splash, ...