Huey Chiao HCB08 - Manual (Page 15)

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● When the triple phone conversation has not been activated, you
can press the decrease (-) volume key for 2~3 seconds to easily
transfer the calls between Call  and Call 2.
● If Call 1 is maintained and Call 2 is on line, quickly press the
function button to end Call 2 and renew Call .
18. Adjusting the Volume
During a call, you may adjust the Headset’s volume.
. To increase the volume, press the increase (+) volume key.
2. To decrease the volume, press the decrease (-) volume key.
Note:
● You will hear the “Du Du” sound while adjusting the volume up
to the loudest or lowest.
19. Changing the Panel
. According to your own like, you can change different colors
of panels.