Con-Space 0302-09-001 Operator Extension Cable Microphone Mic/Mute Switch This came from a city fire department. I haven't been able to test it, but, other than some scratches and scuffs, it is in good used condition. At the time of this listing, I have a quantity of these and so you may not receive the exact one shown in the pictures, but they are all pretty much the same in condition. I have some Con-Space CSI-2100 Communication Modules and Con-Space cables and talk boxes so please take a look at my other listings. J1-4 fdk 81103258