Hongdian H3304 4CH Dual SD MDVR - Manual (Page 21)

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AV IN1-AV IN4/8, every cable has two interfaces and two power cables:
No. Label Color Instruction
1 Video Yellow
VIDEO IN to connect camera or analog
video
singal cable.
2 ACC Red 12V positive
3 GND black GND is to connect ground
4 Audio White AUDIO IN to connect sound pickup
12V and GND are to supply power for camera connected with MDVR.
AV IN External plug Line sequence
AV OUT External plug Line sequence