The Amphenol AC3F5MW is a pre-wired in-line XLR adapter with a 3-pole female XLR socket on one end and a 5-pole male XLR plug on the other, in an all-metal, nickel-finished shell. It lets you plug a standard 3-pin XLR cable into equipment that has a 5-pin XLR input, which is the usual connector for DMX512 lighting control on many professional lighting consoles and fixtures, as well as some intercom and audio devices. Because it is pre-wired and fully enclosed, it is quick to use on a job and more robust than a short adapter cable. Amphenol lists it as comparable to the Neutrik NA3F5M. Check the wiring convention of your system before use: DMX uses pins 1 to 3 on the 5-pin connector, so a 3-pin cable carries a single DMX line. It is typically used by lighting technicians and rental companies.