This MMA -250 mini handheld electric welder is designed for both professional & home use. Crafted steel case, light-weighted welder with robust construction. It applies advanced IGBT inverter technology and PWM controlling system for higher efficiency and power-saving. Perfect for welding carbon steel, such as low alloy components in machinery manufacturing, sheet metal processing, automotive maintenance, guardrail, iron processing, large projects, factory, shipyard, home decoration, construction field etc. Light weight and small size, easy to carry. Adopt most advanced single-tube GBT technology, higher inverter efficiency up to 85%, more power-saving than traditional welder; Premium PWM system provides stable electric arc. According to different welding thickness, current can be adjusted by the knob. 3.2 electrode, welding thickness between: 2-5mm. With a LED screen to display real-time. Equipped with pure copper connector, which is better than aluminum connectors on market, which is unstable and easy to burn-out. To protect the welder, it has over-heat protection, over-pressure protection, over-current protection with good heat dissipation cooling fan at back. Compatible with various acid & alkali electrodes, can be used to weld stainless steel, carbon steel, low alloy steel etc. Less splash, deep molten pool, good weld shape. Type: Mini electric welding machine. Input current: 32.5A. Diameter Of Applicable Welding Rod: 2.5 mm. Applicable Material: Stainless steel, carbon steel, low alloy steel. Communication is the best way to solve the problem. Your satisfaction is our top priority. We have always been committed to providing the best service and reliable products to every customer. However, accidents may occur at times, and we understand your concerns and setbacks. We will reply to you as soon as possible. Our goal is to provide first-class customer service, so we usually do our best to solve any problems!