Specify how many days to keep alarms after they expire or are deleted (except deleted alarms which were never triggered): 0 to not keep -1 to keep indefinitely > 0 number of days to keep.
Brithwch i gadw larymau wedi iddynt ddarfod neu ar ôl eu dileu (heblaw am larymau a ddilëwyd heb eu tanio). @ label