How can I determine the firmware rev of the DJI OM 4? I perused the app but could not find. Thanks.

Hi there pjglad, thank you for reaching us out and I appreciate your inquiry. To check the Firmware Version of your Osmo Mobile 4 you can go to
1. Tap the three dots on the lower left hand corner of the screen to open the Settings.
2. Locate the "General Settings" to view the information about the Device Management, Device Name, Firmware Version and Serial Number.

You can refer to this manual link for full details, just go to the Page 12.
https://dl.djicdn.com/downloads/ ... Manual_v1.2_en1.pdf
I hope you find the information helpful and thank you for your support.

Thank you!!