Duplex Repeater Interface for Motorola Radio GM3188 GR-300 GM300 Radio
This is brand new duplex repeater interface cable for Motorola GM300 connect Surecom repeater system ,16 pins plug kit.
Cable Length : 50CM
Repeater connector Plug : 3.5mm x 17mm
FIT MODEL : SR-112,SR-628,SR-328,SR-629
Repeater connector Plug: 16pin
Applicable radio :
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)
PM400
GM SERIES
GM300 Series
M Series
Maxtrac Series
Radius Series
GM380, GM950, GM340, GM360, GM3188,GM3688 
SM50, SM120
other Motorola radio that has 16 or 20 pin accessory connector at the back
for 20 pin connector plug into middle 16 pin of the 20 pin jack
for 20 pin model GM-338

 Package contents:
1x 46-GM Repeater cable PCB w/ cable