Ok this is where people get confused.
The older Pen and Select has the right Bluetooth to make hands free calls.
The On has some sort of Bluetooth that isn’t suitable for making calls but can be used with the App.
As other have said many times on this forum, you can’t use the Pen and Select Bluetooth with Marvel and Paradise Aids as it makes the Aids stop working correctly, until you turn the Bluetooth back off on the Pen and the Select. That is why they stopped putting the appropriate Bluetooth for calls in the Roger iN devices.
The Roger Bluetooth has never worked with music / You Tube etc as it doesn’t contain the right Bluetooth for that.