You can only add one single-side power meter to the app at a time. If you have two single side power meters, you must delete one of them from the app before you can connect to another.
1. To remove a power meter from the app, swipe left on the device to uncover a Delete Button. Press DELETE to forget this power meter.
2. Press REMOVE to confirm.
3. Once you have deleted the existing power meter you can connect to a different one.