Podofo Wireless Vehicle 2 x Backup Cameras Parking Assistance System Ir Night Vision Waterproof Rear View Camera + 7" Monitor for RV Truck Trailer Bus Pls switch each channel of dual cameras: 2370 and 2510, AV2 on monitor(not AV1), it can't be viewed both at the same time. For maximum signal point the antennas towards each other. Keep monitor and camera at least the distance of 2 meters (about 6.56ft). Kindly contact us to get tech-support via podofo@126.com 2 Wireless Cameras 2 Channel Video Inputs--A camera mounted on the front of the car and the second camera in the back of the car. You can press the Picture Rotation Button to view the back and front of cars. Dual Wireless Ir Night Vision Rearview Back Up Reverse Cameras --Auto Water-resistent Camera Lens, with 18 individual Infrared (IR) LED. 7" TFT LCD wide screen wireless monitor--Anti-glare high resolution. The monitor will start up automatically, and synchronously display the video from rearview camera when you're backing or braking your car. Built-in wireless parking system, it comes with a remote controller and instructions for easy use. Eliminating the hassles of assembly many cables. Double cameras defend your travel road safety, professional truck back up camera and monitor kits, gives you safe driving experience in the day/night.