Sony FE 100-400mm f/4.5-5.6 GM OSS Lens - Manual (Page 93)

Supported profile: HSP (Headset Profile)
You can use either the left or right unit to perform the following operations.
When only one unit of the headset is worn in your ear, operate the headset on the unit that is worn.
Outgoing call
Tap the headset or in the area near your ear twice quickly (with an interval of about 0.2 seconds) to cancel an
outgoing call.
Incoming call
Tap the headset or in the area near your ear twice quickly (with an interval of about 0.2 seconds) to answer a call.
During call
Tap the headset or in the area near your ear twice quickly (with an interval of about 0.2 seconds) to finish a call.
Related Topic
Using only one unit of the headset
Receiving a call
Making a call
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