FORD 2011 F-550 v.3 - Manual (Page 62)

6. ON/OFF/Volume: Press VOL -
PUSH to turn ON/OFF. Turn VOL -
PUSH to increase/decrease volume.
7. CLK (Clock): Press CLK to
toggle between the clock and radio
frequency.
AM/FM stereo single CD/satellite-compatible sound system
(if equipped)
WARNING: Driving while distracted can result in loss of vehicle
control, accident and injury. Ford strongly recommends that
drivers use extreme caution when using any device or feature that may
take their focus off the road. Your primary responsibility is the safe
operation of the vehicle. We recommend against the use of any
handheld device while driving, encourage the use of voice-operated
systems when possible and that you become aware of applicable state
and local laws that may affect use of electronic devices while driving.
Entertainment Systems
62
2011 F-250/350/450/550 (f23)
Owners Guide, 3rd Printing
USA (fus)