Acumen HR427 - Manual (Page 5)

VETTA BIKE MOUNT
BUTTON FUNCTIONS
• LIGHT ALARM Button Press momentarily to light display
3 seconds. Press and hold to keep light on longer & hold 3
seconds to toggle alarm ON/OFF for the current mode displayed.
• MODE/SET Button Press momentarily to change modes. Press &
hold for SET.
• START/STOP/RESET Button Press momentarily for start/stop.
Press and hold to reset stopwatch.
Note: All button produce a short beep when pressed. Press and
hold commands also produce another beep.
Mode/Set
Start/Stop
Reset
The head unit of the HR427 can be detached from the wrist strap
mount and inserted into the handlebar mount as shown.
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