Hi,
I do not which region of NVR, DS-7616NI-I2, I have. Currently, it's running 3.4.62. I checked the Hikvision USA site, their latest version is 3.4.3 about 39.4MB. I checked Hikvision European, the latest is 3.4.92 about 16.3MB. I supposed my installer upgraded the firmware from Hikvision...