MC904 is a 4G MDVR that supports 4 channels of 1080p video input. It features a unique design without a hard drive and supports two 512GB SD cards. With its compact size, it is easy to install and transport. The device has an aluminum alloy shell, ensuring good heat dissipation. It supports emergency alarm function, 4-channel digital signal input, 1-channel digital signal output, and 2 RS232 serial ports for connecting various peripherals. Additionally, the device is equipped with built-in AI algorithms, supporting ADAS, DMS, BSD, and 360-degree video stitching. It effectively helps drivers enhance transportation safety and reduce pedestrian and vehicle accidents.efficiency.