http://file.fojhun.com/NVR-Camera/Firmware/004%20Ai%20Devices/EAi-BOX/NVR_B300_I1-B1227.6.21.220825.zip
http://file.fojhun.com/NVR-Camera/Firmware/004%20Ai%20Devices/EAi-BOX/NVR_B300_I1-B1227.7.23.230627.zip