The manual includes TWS instructions to double your sound:
Connecting your phone allows for hands-free calling and wireless audio streaming. carradio.ie Activate Bluetooth : Enable Bluetooth on your smartphone. : Look for "BLAUPUNKT" in your phone's device list and select it. : If prompted for a PIN, enter
Officially 32GB (FAT32 format). Larger cards (64GB) may work if formatted to FAT32, but the manual does not guarantee it.