This product is our self-developed 9-inch color LCD digital screen quad split screen display driver board. Wide range of uses, after visual and multimedia player used in car entertainment, car / medium and small buses / bus / transportation engineering vehicles such as real-time traffic monitoring, office / store / garden area / plaza security management, station / airport / pier / subway / elevator and other public facilities, such as a variety of video security systems. Driver board using TECHWELL + MSTAR chipset, high-quality, low-power, low cost, set compatible PAL / NTSC standard video signals simultaneously mixed input, the first 5-way dedicated reversing signal input, 12V output power independent of the camera, independent CVBS video signal output and other advantages in one.