This setting applies only to dual power meter systems which are sending power data to Bluetooth display devices.
Compatibility mode
Most display devices and apps operate in compatibility mode when communicating with dual power meters systems, and this is the default for 4iiii dual power meters. It is enabled by tapping on the “Enable 3rd Party” button.
Non-compatibility mode
Some display units require this mode for the correct display of power from dual power meter systems. It is activated by tapping on the “Disable 3rd Party” button.