Use the KMC-21 speaker microphone to make your radio more functional. This black microphone works with Kenwood radios and features a volume control, remote control, channel scan and 2.5mm socket for earpiece. This microphone is splash proof with a swivel belt clip. The KMC-21A replaces the KMC-21 speaker microphone. Specifications, dimensions and model type support are identical to the KMC-21.Low Profile Speaker Microphone, 2-pin Connector Works with KENWOOD NX-1200, NX-P1200, NX-1300, NX-P1300, TK-2160, TK-2170, TK-2400, TK-3160, TK-3170, TK-D240V, TK-D340U portable two-way radios (See a full list of compatible models)