7 inches digital screen display, supports quad triplex, dual,single touch screen display;USA Techwell car regulation dedicated digital video processor; Quad touch monitor, easy to oprate, support single- point touch. Quad touch screen support shortcut touch to Single View. Totally with 9 different view modes. Quad touch screen support single-piont touch to single/dual view, slid to turn on/off. OSD MENU Support 4 language: Chinese, English, French, German OSD MENU Separately Set Each Camera Reversing Image Delay Time 0-30s LED backlight display with constant voltage constant current circuit protection design. Load Dump: DC14+87V(Td400mS) 5pulses