How to adjust the HT 509,000 calendar alarm clock?

The setting method of ht5090 digital perpetual calendar alarm clock is as follows:

Press and hold the setting key (3-5 seconds) until you enter the alarm clock setting state, and then press the setting key to select the corresponding alarm clock group;

2. After selecting grouping, press the up key or the down key to adjust the time;

Third, after adjusting the alarm clock time, press the exit button to exit the alarm clock setting state.