This is an upgrade from our previous version with a digital screen. Hot start& Arc force Adjustable. Hot start: Increase the current when starting, providing fast, high-quality and stable arc. Arc force: prevents electrodes from sticking to workpiece, allowing you to obtain deeper and smoother seam. More stable arc, Ideal performance for welding thin workpieces. Dual Voltage Input&Applicable Material. With a simple 110/220V adapter, it could be plugged dedicated 220V outlet for more power. Suitable for various kinds of metal materials, such as stainless steel, mild steel, cast iron, sheet metal and square pipe as well. Stick Welder 205A pro. 220V to 110V Adapter (AC power source only).