Sony WALKMAN NWZ-A15 Help Manual page 383

Help Guide
Troubleshooting
Digital Media Player
NWZ-A15/A17
Pairing cannot be done.
Pair the devices within the Bluetooth communications range.
If the supported profiles are different, your Walkman and Bluetooth device cannot be paired. See "Specifications."
Your Walkman cannot be paired if the number of paired devices exceeds the maximum number. If you want to pair
another device, delete unnecessary paired devices in advance.
Related Topic
Specifications
Pairing and connecting with a Bluetooth audio device
Disconnecting a Bluetooth audio device
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