Front view camera power: supplied by control box system for the front view camera 15 seconds delay function Rear view camera power: supplied by control box system, or could be supplied by reverse lamp power. Functions: 1.Automatical front view when starting: When car engine starts, the system will activate the car monitor and front camera to check the front view for 8 seconds, then turn off. 2. Automatically rear view: When you pull the reverse gear , the system will activate the monitor and rear view camera till the reverse gear back, then switches to front view camera video for 15 seconds then shut off. 3. Front view always activate mode: Press the control switch to enter Front view always activate mode. In this mode, the system will activate monitor and the front view camera always. To quit the mode, press the control switch again. Working priority: Back ViewFront View Specifications: Working Power: Max: 50MA, 12V DC System signal: PAL/NTSC Video Output: 1.0VPP/75 Working temperature: -20~80 Size: 63x42x23mm Quantity: 1 Set Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Contents: 1 x Control Box 1 x Video+Power Cable Set 1 x Switch Button with cable