Type in how many of each period of time it is. Type a negative for that time to go back.(ex. it is 10:45 and you want one to go off at 11:00, when it asks how many hours you put 1 and how many minutes you put -45) Also, more than the limit of the previous does not carry over.(ex. you put 60 for minute and the hours do not change by 1)
Features: Exact Time Flashing Screen and Repeated Popping for Alarm