Digital watches have three buttons with the following functions:
HOUR (hour) - Press the "H" to set the clock. MIN (minutes) - Press "M" to set the minutes. RESET (Reset) - Press the "R" for reset to zero minutes. Wherein:
- Pressing the "R" between 10:30 am and 11:29 changes the hours 11:00; - Pressing the "R" between 11:30 and 12:29 changes the clock at 12.00.