Roksan Audio Oxygene Owner's Manual page 11

Changing between Bluetooth Devices
You can easily switch between playing on different Bluetooth devices.
The Bluetooth module in the Oxygene Integrated Amplifier receives one
signal at a time. Please disconnect one device from the Oxygene Integrated
Amplifier before you play from another, e.g. disconnect one phone before
you can connect and play music from a different phone. Up to 16 Bluetooth
devices will be saved in the Oxygene memory.
Note: Sound output volume/quality produced on the Bluetooth channel
can differ with the use of different brand/make of Bluetooth devices. e.g
devices with aptX technology will sound superior.
Recommendation: For optimum results use lossless audio format.
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