The Hozelock Auto Off Controller is a tap mounted watering controller that can be manually set for a period up to 120 minutes and will automatically switch off to help save water It is easy to set up with its simple mechanical dial to set watering duration The Auto Off Controller is a versatile unit that can be used with Garden Sprinklers up to 10 bar or low pressure micro irrigation watering 15 bar It could also be useful when filling a pond or paddling pool to avoid wasting water No batteries required