Ram Trucks 2014 ProMaster Commercial - Owner Manual - Manual (Page 159)

Clock
Pressing the DISP button for more than two seconds
enables or disables the clock display. When this feature is
enabled, the display shows
ЉCLK ONЉ and the clock is
displayed whenever the ignition is switched on, even if
the radio is off. This function takes priority in the display
whenever you access any of the radio functions. If no
buttons are pressed within 10 seconds, the display will go
back to showing the clock. When this function is dis-
abled, the display shows
ЉCLK OFFЉ.
USB Mode (MP3/WMA/AAC)
WARNING!
To remove devices connected to the USB port, first
select the other audio source. Failure to follow this
procedure can cause damage to the connected device.
Due to the extensive range of makes and models of
storage devices available on the market, not all
devices have compatibility required for proper func-
tioning of Car Radios. Use only quality USB devices.
Due to the extensive range of brands and models of
storage devices available on the market, not all devices
are compatible with proper functioning of the car radio.
NOTE: The car radio is only compatible with USB mass
storage devices that are fully compatible with the USB 2.0
standard. Use quality USB devices only.
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UNDERSTANDING YOUR INSTRUMENT PANEL 157