This arc welding machine is easy to use and portable to carry. It adopts high frequency transformer and capacitor with strong power storage capacity to ensure superior and stable performance, can be widely used in door and window installation, signboard, auto repair, building construction, scaffold erecting, bridge, shipbuilding and more. Features: Compact and portable, easy to use and carry. Powerful and stable performance, rapid heat dissipation and long service life. High frequency magnetic ring transformer, with high rated duty cycle. Using capacitor with strong power storage capacity to ensure current output. High-quality waterproof casing, over-current and over-temperature protections of the machine, with fault detection indicator. With arc starting and adjustable output current, effectively prevent welding rod sticking. Rotate the knob to adjust the current from 20A to 250A. Easy to weld stainless steel, alloy steel, carbon steel, copper, copper alloy and other non-ferrous metals, even applicable to specific welding rods such as acid, alkaline and cellulose electrodes. This mini welding machine can be widely used in door and window installation, signboard, auto repair, building construction, scaffold erecting, bridge, shipbuilding, etc. Note: 1. Power plug is not included, please prepare by yourself. 2. Read the user manual carefully before use. 3. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color & Voltage: Green 220V/ Blue 220V/ Blue 110V (Optional) Material: Metal + ABS Welding Method: Draw Arc Current: Direct Current Rated Duty Cycle: 15 (Green); 60 (Blue) Power: 4000W (Green); 4800W (Blue) Current Adjustment: 20-250A Applicable Welding Rod: 1.6/ 2.5/ 3.2/ all day welding Welding Thickness: 2-7mm (Green); 2-8mm (Blue) Item Size: Approx. 160 * 100 * 250mm / 6.30 * 3.94 * 9.84in (Green); 120 * 85 * 190mm / 4.72 * 3.35 * 7.48in (Blue) Package Size: Approx. 29.5 * 17.5 * 23cm / 11.61 * 6.89 * 9.06in Package Weight: Approx. 2300g / 5.07lbs (Green); 2000g / 4.41lbs (Blue) Package List: 1 * Welding Machine 2 * Quick Connector 1 * Hex Wrench 1 * User Manual