Duplex Interface Cable for Motorola CDM750 M1225 CM300 GM300 Mobile Radios
CM300, CM200 CM series, (must use 2 CM series models.). CDM750, CDM1250, CDM1550, ( for CDM series into the center 16 pin of the 20 pin ). work as duplex model, both radio will receive and transmit. 1 Duplex repeater Interface cable.