How to find OtO's firmware version?

If you want to find out which version of firmware OtO is on:

Option 1:

Scroll down below the Solutions section of the device details page. The Firmware version and OtO's serial number will be written there in light grey.

Option 2:

In newer versions of the app, you can see the Firmware version and OtO's serial number in the "About Device" menu which can be accessed from the device details page.