Asus USB-BT21 - Manual (Page 30)

headphone volume.
· Adjust the volume using the volume control on the
media player rather than the master volume control
on the computer.
I cannot communicate with
a cell phone or reconnect
to a cell phone.
Verify that the cell phone is in Discoverable mode, is in
range, and that the Bluetooth radio is turned on. See
Finding Bluetooth Devices .