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.