Hold to turn the device on and off.

Select to turn the backlight on and off.

Select to choose an activity profile.

Select to start and stop the timer.

Select to choose the highlighted menu item.

Select to view more information.

Select to scroll through the screens, pages, options, and settings.

Hold to open the music controls for your smartphone.

Select to return to the previous screen.

Select to mark a new lap, when the lap key function is enabled.

From the time of day screen, select to view the menu.