from instruction manual page 12-13 (
http://www.suuntowatches.com/pdf/wrc_en.pdf)
Selecting the Units of Measurement
To change the unit of measure displayed:
1. Check the mode indicator. If the mode arrow is not on TIME, PRESS the [Mode] button until the arrow is directly below TIME on the Mode Indicator Bar.
2. PRESS the [Mode] and [Select] buttons simultaneously and hold for 3 seconds. Field 1 will display "SET" momentarily and then display "UNI".
Note: If the user does not press any button for 1 minute in the setup mode, the display will automatically exit setup.
WARNING: If the user presses the [Select] button (and does not hold for 2 seconds) while in the "UNI" setting mode, the user will be in the Pressure Sensor Calibration. Refer to the next section for details.
3. PRESS the [Select] button and hold for 2 seconds. Located to the right in Field 2, "m" or "ft" will begin to flash.
4. PRESS the [+] button to toggle between "m" and "ft".
5. At the unit of measure desired, PRESS the [Select] button to move to the next unit.
At the unit of measure desired, PRESS the [Mode] button to accept the changes. PRESS the [Mode] button again to return to the main time mode.
Selecting the units of measurement is complete.
Hope this helped!