Easy to Install – This backup camera system powered by fuse box, connected the red to ACC(9-36V), the black connect the Metal (Ground), the green connect the reverse gear circuit as a trigger power, monitor and backup camera will automatically turn ON/OFF when the vehicle is ON/OFF, different channels can set by the button on monitor, NOTE: CH2 is as reversing channel, can be triggered by the Green wire (Connection Diagram and Installation Instruction are included)