Q&A: What does ITH-20R receiver 24 hours/all time mean?

The ITH-20R receiver will display the maximum/minimum value of temperature and humidity that have occurred in past readings.
The 24-hour record is the maximum/minimum temperature and humidity within 24 hours after clearing the data by long pressing the MAX/MIN/CLEAR button.
If more than 24 hours, the time display will switch from 24 hours to all-time.