1.Hold down (A) for at least two seconds. Release the button when the Step Reminder setting screen ([OFF] or [ON] flashing) appears.

2.Press (C) five times so the current setting ([12H] or [24H]) is flashing on the display.

3.Press (D) to toggle the setting between [12H] (12-hour timekeeping) and [24H] (24-hour timekeeping).

4.Press (A) to exit the setting screen.