Sony WH-CH720N Help Manual page 50

You will hear a notification sound indicating that the connection is established.
5.
On the [Recording] tab, select [WH-CH720N], right-click it, and select [Connect] from the displayed menu.
Hint
The operation above is an example. For more details, refer to the operating instructions supplied with the computer.
Note
If the music playback sound quality is poor, check that the A2DP function which supports music playback connections is enabled
in the computer settings. For more details, refer to the operating instructions supplied with the computer.
If the last-connected Bluetooth device is placed near the headset, the headset may connect automatically to the device by simply
turning on the headset. If this is the case, deactivate the Bluetooth function on the last-connected device or turn off the power.
If you cannot connect your computer to the headset, delete the headset pairing information on your computer and perform the
pairing again. As for the operations on your computer, refer to the operating instructions supplied with the computer.
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