Can be set to water during ideal times to minimize evaporation and up four times per day, which is especially useful for tomatoes, for more even moisture to prevent skin cracking. Push button programming and large LCD display. Selectable watering duration from 1 minute to 12 hours 59 minutes in 1 minute intervals. AM/PM clock. 7-day watering calendar. Simple manual override operation using Start and Stop buttons is helpful for irrigation system maintenance. Operating pressure range: 10 to 140 psi. Flow rate up to 6.3 gpm at 30 psi. ¾" FHT inlet and ¾" MHT outlet fittings. Electronic battery indicator provides constant reading of battery strength. One 9-volt battery required (not included) can last up to one year.