Cp-unr-4k2161-v2 Firmware Download ((better)) Link
If you purchased this NVR from a third-party vendor or under a different brand name (white-label), the manufacturer's website may not have the file.
Do not power off the NVR during this process. The system will automatically restart once the update is finished. cp-unr-4k2161-v2 firmware download
Some later V2 units support OTA updates through the or gDMSS Plus app. Go to device settings → Firmware Update → Check for updates. If you purchased this NVR from a third-party