Sony NW-WM1Z Instruction Manual page 97

If the smartphone supports the NFC function, the Walkman and the smartphone can be paired and connected by touching them
together.
The Walkman stays connected to the smartphone until you turn off the Bluetooth Receiver function. To conserve the battery
power, turn off the Bluetooth Receiver function or terminate the Bluetooth connection with the smartphone.
If the volume is low and you hear noise while you are using the Bluetooth Receiver function, try the following. First, turn the
volume up to the maximum on the smartphone. Then, adjust the volume on the Walkman.
Note
The battery life becomes considerably shorter when the Bluetooth Receiver function is active.
You cannot use the Bluetooth Receiver function while any of the following functions is active. Turn off the function and switch to
the Bluetooth Receiver function.
USB-DAC function
If sound is interrupted or skips during a Bluetooth connection, try the following.
Place the Walkman and the smartphone closer together.
Select [Connection Preferred] by tapping the following menu items.
– [Settings] – [Receiver Playback Quality] ([Bluetooth]) – [Connection Preferred].
Then, terminate the Bluetooth connection and reconnect to the smartphone to apply the new setting.
A Bluetooth connection is terminated automatically in the following cases:
The battery of the Walkman has run out.
The Walkman is turned off.
If you receive an incoming call to the smartphone while the Bluetooth Receiver function is active, the voice of the caller will be
output from the smartphone. You may hear the ring tone, depending on the specifications of the smartphone.
The contents of the Help Guide may be subject to change without notice due to updates to the product's specifications.
Related Topic
Connecting the Walkman to an unpaired smartphone for the first time
One-touch connections with a smartphone (NFC)
Configuring the Bluetooth function (Bluetooth receiving mode)
Notes on the Bluetooth function
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