Duplex repeater Interface Cable Tool for Motorola radio CDM750 M1225 CM300 GM300
For Motorola CM300, CM200 CM series, (must use 2 CM series models.). For Motorola CDM750, CDM1250, CDM1550, (CDM series plug into the center 16 pin of the 20 pin jack). GM300 Series. 1 x Duplex Repeater Interface Cable.