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Suunto D4f User guide


To active the backlight while diving, press MODE.

Otherwise, keep MODE pressed until the backlight activates to use the backlight.

You can define how long the backlight stays on when you activate it or turn the backlight off altogether.

To set backlight duration:

  1. While in time mode, keep DOWN pressed.
  2. Press DOWN to scroll to Backlight and press SELECT.
  3. Set duration or turn off with DOWN or UP.
  4. Press MODE to save and exit to settings.

When the backlight is off, it does not illuminate when an alarm sounds.

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