A larger range of run times and intervals is allowed with this irrigation timer. The watering duration ranges from 1-second to up to 1-hour 39-minutes while the irrigation intervals might be as short as 1-hour or as long as 15-days, depending on your watering requirements, which allows you to tailor your watering schedule flexibly. Programmable & Easy to Operate - Clock, start time, duration and frequency can all be easily set by pressing the keys on the timer. Then, your irrigation system will be fully automated and run according to the schedule you've set it for. Almost all of the information concerning the sprinkler timer's operation is displayed on the LCD screen, which is large and easy to read.