Sony WH-CH700N Help Manual page 30

Touch [WH-CH700N].
4
You will hear a voice guidance "BLUETOOTH connected".
Hint
The above procedure is an example. For details, refer to the operating instructions supplied with your Android smartphone.
If the smartphone was connected with the headset the last time, an HFP/HSP connection is made when you turn on the headset.
While the headset is on, you can make an A2DP connection (music playback) by pressing the
Note
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. In this case, deactivate the Bluetooth function on the Bluetooth device or turn off the power.
If you cannot connect your smartphone to the headset, deactivate pairing on your smartphone and perform pairing again. For
details, refer to the operating instructions supplied with your smartphone.
Related Topic
How to make a wireless connection to Bluetooth devices
Pairing and connecting with an Android smartphone
Listening to music from a device via Bluetooth connection
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button.