Power/Function Button

Long press the key to turn on or off the power supply. Short press it to change among the three modes: Log + Navigation, Log, and Navigation.

  Point of Interest Button

Short press the button to mark the current position as a POI (Point of interest). Long press the button to start a new track.

  Record Button

Press and hold the Record button to begin audio recording. Release the button to stop recording and mark the current position as a POI.