Lawn Master II Landscape Timer. Features 3 independent watering programs and up to 3 start times per program. Ideal for traditional and drip irrigation. Pump start relay and rain sensor ports for easy connections with no wire splicing. 365-day calendar allows watering on specific days of the week. Adjust run times as weather or seasons change. 3 modes of operation include: automatic, manual station, and manual program. Battery back-up stores programming (9 volt battery required). AM/PM clock sets length of watering from 1 minute to 6 hours. For indoor use only.