Plantronics Blackwire 435-M - Manual (Page 10)

10 10
In-line controls
Call answer/end Can be used to answer or end a call directly from the headset with a single press.
LED will flash green when a call is coming in and be solid green when on a call.
Volume Volume up and down are available.
Mute A single press of the mute button will mute the microphone. A red LED will be
on when you are muted. Pressing this button again will take the microphone off
mute.