Generic gsd Duplex Repeater Interface Cable For Motorola Radio EM200/CDM1550/CM200/PM400 TX/RX-2 Duplex Repeater Interface Cable For Motorola Radio 16 Pin Plug Connector, Approx 15 " Length Compatible models: PM400, CM300, CM200 CM series, (must use 2 CM series models.) CDM750, CDM1250, CDM1550, (CDM series plug into the center 16 pin of the 20 pin jack) GM SERIES, GM300 Series, M Series, Maxtrac Series, Radius Series M1225 GM380, GM950, GM340, GM360, GM3188 SM50, SM120