ESAB LAD 800 is a constant voltage welding rectifier designed for submerged arc welding, gas-metal arc welding, and arc-air gouging. It offers precise voltage control with 10 steps within two ranges. The power source is equipped with a burnback timer, output terminals for welding cables, and a receptacle for remote control. It also includes safety features like a surge suppressor and fuses for protection against overloading. The LAD 800 provides a reliable and efficient welding solution for various industrial applications.