(often cited as ) refers to a widely used firmware series for generic or "white-label" Chinese DVRs and NVRs, primarily those using XiongMai (XM) hardware and the
Most manufacturers using this platform provide downloads based on that Version ID: Official Xiongmai Service: Use the official Xiongmai Download Center to search for your 8-digit ID. Enster/XMeye Support: Enster's Firmware Repository v403r11 h264 h265 dvr nvr firmware download hot work