Grandstream Networks, Inc.G
126 Brookline Ave, 3rd FloorG
Boston, MA 02215 USAG
Voice: (617) 566-9300 G
Fax: (617) 249-1987 G
www.grandstream.com
GFor Certification, Warranty and RMA information, please visit G
www.grandstream.comG
Adjust the Headband
Place the headset receiver to
your ears. Adjust the head-
band until it is comfortable,
ideally ensuring that there is
virtually no pressure felt on the
ears.G
PosiƟon the Microphone
To avoid low or distorted sound, and to provide clear and
crisp telephone calls, the microphone should be positioned
within 30-40mm of your mouth. The microphone boom arm
will move in a variety of directions to ensure the best fit.
Answer/End call Tap the Answer/End button
Reject call Double-tap the buttonG
Adjust volume Tap the Volume up or Volume
down button
Mute the micro-
phone
Tap the mute microphone but-
ton
Call light on/off Tap the Answer/End button,
Blue light on
Mute on/off When mute, Red light on
How to Use
FUNCTION ACTION
How to Care for Your Headset
1.Always store the headset with the power off and safely
protected.
2.Avoid storage at extreme temperatures (above 25°C/77°F
or below -20°C/-4°F). This may adversely affect the headset.
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Display for mute microphone Volume up Hook On/Off Key
Display for Hook OffG
Mute microphone Volume down
