The perfect companion to a sprinkler or drip watering system, this electronic water timer couldn't be easier to set. Press the green button to start the watering cycle, then the red button when watering is sufficient (up to 1 hour later). The timer automatically stores this watering duration & repeats it at the same time every day! An LED indicates all operations & can also be used in combination with the red & green buttons to set a custom programme without waiting for the watering cycle to end. Operates on one 9v battery (not included) that will last all season.