Volume Control
VOL/ 
(Volume/Power): Turn
clockwise or counterclockwise to
increase or decrease the volume.
See also:
Battery Replacement
To change the batteries:
1. Loosen the screw to the battery door located on the left side of the
headphones.
2. Slide the battery door open.
3. Replace the two AAA batteries.
4. Replace the bat ...
Cellular and GPS Antennas
Avoid placing items over or near
the antenna to prevent blocking
cellular and GPS signal reception.
Cellular reception is required for
OnStar to send remote signals to
the vehicle. ...
Global Positioning
System (GPS)
- Obstruction of the GPS can
occur in a large city with tall
buildings; in parking garages;
around airports; in tunnels,
underpasses, or parking
garages; or in an area with
very dense trees ...