Certainly In-Ear True Wirless headphones are compatible no matter which product. The in-ear headphones and the Marantz must be visible in the settings of your mobile phone under "Bluetooth". To do this, connect the two devices to the mobile phone according to the operating instructions. If you select Bluetooth via the remote control, you will stream music from the mobile phone via the speakers. If you want music via the in-ears, select the music source on your mobile phone, either from a station or from your media library.

Via Blootooth, e.g. the Jabra Elite 85t, you can only listen to music that is stored on a device, in my case on the iPhone and iPad. Radio stations must also be available as an app on these devices. Of course, this also applies to Android devices. Wifi must be available. CD via Blootooth is not possible. But the Marantz also offers a headphone connection, so setting up in-ear headphones will not be a problem. I am extremely satisfied with the Marantz receiver.