Main feature:  1. Perfect bird view (aerial view, round view, or panoramic view) of the car surroundings 2. 4 Channel recording from the 4 cameras Brief of the recording function:  1. The system will automatically start recording when the engine is on, with loop recording for every 1 minutes. For a 2GB TF card, it can last about 1 hour. 2. When the car is ignited and the monitor doesn't show the video from the cameras, the system will record in the background. The bird view and the front view will be recorded. 3. When the car is ignited and the monitor is showing the video from the cameras, all the scenes displayed on the monitor will be recorded. 4. There will be an USB interface with the system which can be used to connect a PC to copy data from the TF card. Note: Please comfirm that there is a in-dash monitor or other LCD monitor which can input and display a PAL or NTSC video(RCA interface) in your car. The video output of this product only fit for the Monitors which with RCA interface, please check your car's monitor carefully. (Generally, the video input interface of "original car monitor" is LVDS or other else. And the car monitor(DVD, GPS Navigation) which you bought separately has a RCA interface). If your monitor don't have RCA interface, you need a video decoder. or please contact us. Packing list:  Control box X 1 Camera X 4 Infrared receiver X 1 Power cable X 1 Extension cable of camera X 4 Calibration cloth X 4 Remote control X 1(Without battery)