Hello - According to FiiO you can, but not in the best audio quality.

It is best to download the app for Android and iOS, where you can also set configurations.

English:

TX (Bluetooth transmitting): connect the BTA30 Pro to the Bluetooth receiving device, Device 1 (PAIR1 is prior as default), and hold button C for about 3s to enter the
pairing state again. The BTA30 Pro will automatically search for Device 2 and start to pair with it.

Note: When working in LDAC and aptX LL codec in TX mode, the BTA30 Pro cannot be connected to two Bluetooth devices simultaneously.

Audio Input/Output and their Priority

German:

TX (Bluetooth transmission): Connect the BTA30 Pro to the Bluetooth receiving device, device 1 (PAIR1 is upstream by default), and press and hold the C button for about 3 seconds to enter the
pairing state again. The BTA30 Pro automatically searches for device 2 and starts pairing.

Note: When working in LDAC and aptX LL codec in TX mode, the BTA30 Pro cannot be paired with two Bluetooth devices at the same time.

Audio input/output and their priority

Here is the whole manual:

https://manuals.plus/fiio...


Good luck