Sony WALKMAN NWZ-A15 Help Manual page 94

Note
If the pairing or transfer times out and stops, send the content from the Bluetooth device again.
Content transfer may fail if the Bluetooth device is too far from your Walkman, or there is interference from other
devices. In these cases, reduce the distance between the Walkman and the Bluetooth device, and keep a good
distance from other devices or turn them off if possible.
Playback stops when your Walkman receives content.
The maximum receivable file size is 4 GB.
Related Topic
Selecting the memory to use
Entering a passkey to make a Bluetooth connection
Sending content via a Bluetooth connection
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