Electronic clock have three buttons of management with following functions:
HOUR (Hour) – Press button "ì" for installation of hours. MIN (Minute) – Press button "M" for installation of minutes. RESET (Dump) – Press button "R" for dump of indications of minutes on a zero. Thus:
– Pressing button "R" between 10:30 and 11:29 changes indications of hours at 11:00;
– Pressing button "R" between 11:30 and 12:29 changes indications of hours at 12:00.