Sony MDR-1RBT - Manual (Page 69)

Help Guide
Receiving a call
When an incoming call arrives, a ring tone will be heard via the headset.
The ring tone differs in the following ways, depending on your smartphone or
mobile phone.
ring tone set on the headset
ring tone set on the smartphone or mobile phone
ring tone set on the smartphone or mobile phone only for a BLUETOOTH
connection
1. Connect the headset with a BLUETOOTH device.
2. Press the button on the headset.
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