DISCOVER D312U User manual

Telephone Headset
D312U

User Manual
D312U is a lightweight telephone headset with retractable headband.
It’s compatible with all kinds of mobile devices and computers,
supports the functions of playing music and HD web phone calls.
1. Design

1) Retractable headband
2) Microphone
3) 3.5mm AUX Connector
4) USB Connector
5) Volume Control
6) Volume “+”
7) Volume “-”
8) Mute
9) Microphone Mute
2. Button Function
Note: The led indicator is red only when microphone is
mute. Under other status, the indicator is blue.

No NameIcon 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

3. Connection

4. Operation Instruction
1) For Windows Computer
Step 1: Click on “Start” at lower left corner, and then click “Settings”.

Step 2: Input “Audio” in “Windows Settings”, and then choose
“Manage audio devices”.

Step 3: In sound options, choose “D312U” in the list of “Playback”
and “Recording”.
D312U

2) For MAC or iOS Computer
Step 1: Click top left corner of your screen and select “System
Preferences”.

Step 2: Select “Sound” from the list.