: Optimized for Hisilicon-based processors, including the Hi3520, Hi3521, Hi3531, and Hi3536 series. How to Identify Your Current Version
: Log into your recorder and navigate to [System Info] > [Version] . v403r11 h264 h265 dvr nvr firmware download hot upd
Before downloading, you must confirm your hardware matches the firmware version to prevent bricking the device. : Optimized for Hisilicon-based processors
: Addresses critical issues such as the "green flash" during playback and improves overall system reliability. including the Hi3520