WT2040 ARC welding machine adopts pulse width modulation (PWM) technology and insulated gate bipolar transistor (IGBT) power module. Control module IGBT dual 110V and 220V,20-165 amps are suitable weld thin workpiece. The lightness and strength of its components make this a reliable work tool for personal use. Over-voltage protection,undervoltage protection,over current protection,over load protection. Light weight,strong powerful welding. Easy carry with belt. Specifications: Weight: 3.2 KG Cooling: Fan Cooled Welder Type: Inverter Power Source Dual Voltage: 110 V/220 V +/- 15% Nominal Supply Frequency: 50/60 Hz Welding Current Range: 10 - 165 A. Open circuit voltage:62 V DC. Protection Class: IP23. Packing List: 1 * MMA 165A Welding Machine. 1 * 200 Amp electrode holder with 1.5M cable. 1 * 300 Amp earth clamp with 1.5M cable. 1 * Welder Power Converter. Operating Manual.