ESAB Transmatic Lynx 2D & 4D are wire feeders designed for use with Transweld Challenger MIG power sources. They offer precise wire feeding and digital volt/ammeter for monitoring welding parameters. The Lynx 2D is suitable for hard solid wires, while the Lynx 4D is ideal for hard and soft solid wires and cored wires. Both feeders can be located on top of the power source or up to 5 meters away, providing flexibility in workshop setup.