Added safety, multiple configurations and easy install is what this wireless backup camera system is all about. With a quad view display, the system can connect and view simultaneously up to four cameras and can even record video footage from each camera individually! This system has multiple display options including single, split screen and quad view. Footage records onto an SD card and loops over oldest recordings when the card gets full. Perfect for RV's, Trucks, Trailers and all commercial vehicles, this system is ahead of the game when it comes to vehicle safety. Note: Details may change based on item configuration. Note: Aluminum causes interference to the wireless connectivity. If you have an aluminum trailer, it's recommended to go with a wired system like the RVS-770613-213. Note: Distance grid lines and audio do not work with the cigarette lighter plug configuration. Note: SD card not included. Note: Wireless Refers to connection between monitor and camera. Both individual components must be powered.