Backup Monitor: 7 inch TFT LCD widescreen with high resolution, full color, PAL/NTSC auto, 2 video inputs. Switch picture by V1/V2 button or remote control. Come with remote control and stand. 2 Rear View Cameras: Depend on your needs, you can adjust install camera location. Rear view camera: IP68 waterproof, with reversing line, 18 individual Infrared (IR) LED night vision support 30ft (max). A/B button doesnt work?