Lawnmaster II, 4 Zone Indoor Timer, 3 Independent Watering Programs, Up To 3 Start Times Per Program, Perfect For Traditional & Drip Irrigation, Pump Start Relay & Rain Sensor Ports For Easy Connection With No Wire Splicing, 365 Day Calendar, Water On Specific Days Of The Week, Odd Or Even Days, Or Day Interval, With Day Exclusion To Meet Water Restrictions, Adjust Run Times As Weather Or Seasons Change, 3 Modes Of Operation, Auto, Manual Station & Manual Program, Battery Back Up Stores Programming, Uses 9V Battery, Not Included, Indoor Use Only.