system commands
-------------------------
[F1] NAVIGATION ON
[F2] NAVIGATION OFF
[F3] VOLUME DOWN
[F4] VOLUME UP
[F5] SOUND OFF
[F6] SOUND ON
[F7] VOICE ON
[F8] VOICE OFF
[F9] SOUNDFX ON
[F10] SOUNDFX OFF
[F11] NEW USER
[F12] RESTART
-------------------------
PRESS A FUNCTION KEY 
OR TYPE THE COMMAND.
-------------------------
AWAITING COMMAND...