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![](https://files.manualsfile.com/78765544-mnvr4208-gfwi/bg10.png)
8
2.2.3.4 Voice talk port
Voice talk port
Name Function
+12 +12V output
Ground
Mic In that can connect to microphone.
Mic Out that can connect to earphone.
SPK+ Speak positive pole
SPK- Speak negative pole
2.2.3.5 AV OUT port
AV OUT port
Name Function
1 +12V/1A output
2 Ground line
3 Audio output
4 Video Output
2.2.3.6 RS-232 interface
RS-232 interface
Name Function
1 +12V/1A output
2 Ground line
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