according to the instruction manual of the programmable bell ringer, the setting method of the 128f series programmable bell ringer is as follows:

1. Week mode setting: press the "Week" key until the lights are all flashing from Monday to Sunday, which means that the bell rings all seven days a week.

2. music mode setting: when the music light 1 is on, it displays "y-:15". Press "+"for 5 times to adjust to display "y-:2". Press "Music 2" again, and the music 2 light will come on. Press "+"once to adjust.