No
Name
Icon
Function
While playing music, short press to
pause or continue to play.
Short press “+” to volume up; Long press
“+” to make it up to maximum volume.
Short press “-” to volume down; Long press
“-” to make it down to minimum volume.
While in a call, single press the button,
microphone is mute, and indicator is red;
Single press the button again to back to a
normal status, and the indicator is blue.
Mute
Volume “+”
Volume “-”
Microphone
Mute
1
2
3
4
Summary of Contents for D312U
Page 1: ...Telephone Headset D312U...
Page 5: ...3 Connection...
Page 7: ...Step 2 Input Audio in Windows Settings and then choose Manage audio devices...
Page 8: ...Step 3 In sound options choose D312U in the list of Playback and Recording D312U...
Page 10: ...Step 2 Select Sound from the list...
Page 11: ...Step 3 In sound options choose USB Audio Device in the list of output and input...
