The Shure Model 590T is a universal replacement microphone for over 40 mobile two-way radio sets. The microphone is compatible with a variety of five-conductor, shielded, coil-cord cables (sold separately), each of which has a locking, telephone-type modular plug on the microphone end, and a choice of popular transmitter input connectors on the other.
One cable model provides only bare tinned leads on the transmitter input end so that the user can install the desired connector. Since cable damage is the major cause of microphone failure, this makes the 590T quick and simple to repair.