Sony MDR-1RBT - Manual (Page 64)

Supplied cord
Notes
Use the supplied cord only.
The BLUETOOTH function is disabled when the cord is connected.
You cannot use the POWER button, button, button, / buttons, or
microphone when the cord is connected.
When there is an incoming call
When an incoming call arrives, a ring tone will be heard via the headphones.
Accept the call using your smartphone or mobile phone, and talk using the
microphone of the phone. You can hear the voice of the caller from the
headphones.
If you disconnect the cord from the smartphone or mobile phone, you can talk
using the microphone and speaker of the phone.
To close the cover of the INPUT jack
Push the catch at the edge (the round part) of the cover into the jack compartment.
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