How can you set the Caixing CX-2158 to 12 hr time instead of the military time?

For clock settings

Clock buttons from the left.

[1] Set
[2] Shift
[3] Modify
[4] Alarm
[5] End
[6] Reset - (use paperclip to push button in hole.)


Light indicators

[A] A.M.
[C] P.M.
[B] Alarm(s) active.
[D] Hour Notice

To set time and date

1.Push SET, push SHIFT to transfer from YEAR to MONTH to DAY to HOUR to MINUTE
2. Push MODIFY to change to desired value in every field (blinking)
3. Press SET or END to save.

To change from 24 - 12 hour format
1. Press MODIFY continously for about 3 to 5 seconds
NOTE: in 24-hour format, both the A.M and P.M light is OFF


TO SET ALARM

1. Push ALARM, and alarm setting number 1 will show, push ALARM again to show alarms up to 8 or 9 (depending on model)
2. When desired alarm number is chosen, Press SET
3. Push SHIFT to transfer from HOUR to MINUTE
4. Push MODIFY to change desired value in every field( blinking)
5. Push END to save, (Please note Red ALARM light will lit)


TO CANCEL ALARM

1. Push ALARM until the desired alarm to cancel is shown.
2. Press MODIFY ( the dispaly will show --:--)
3. Press END (NOTE: Alarm light would only turn off only if all alarm is cancelled)

TO SET HOURLY NOTIFICATION OFF AND ON

1. Push MODIFY button once (hour notice light would lit) - hourly notice is turned ON
2. Push MODIFY button again (hour notice light is off) - hourly notice is OFF

My clock shift button not working then how to set time, please someone knows thst