XIEGU G106 Operation Manual page 5

11 Antenna interface
BNC interface with an impedance of 50Ω
12 KEY interface
3.5mm stereo socket (3-wire), used to connect a manual key or an
automatic key (see Page 5 for the definition)
13 ACC interface
8-pin Mini-Din interface (see Page 5 for the definition)
End Interfaces
14 Ground nut
For grounding cable of equipment
15 COM Interfaces
Communication interface
16 DCIN external DC power interface
5.5*2.5mm DC power socket
4