Automate your drip system and enjoy worry-free watering with the Hose-End Automatic Water Timer. Programming your watering schedule is easy with the simple， straightward interface. Use the How Long dial to set frequency and the " * How Often dial to select run time. The Manual Water/Rain Delay dial allows for manual watering (for 3 to 90 minutes) or to postpone watering (from 24 to 72 hours). An indicator light blinks to confirm changes are made， so there's no need to second guess. The battery-operated timer signals when batteries are running low， and has a unique water-saving feature that turns the valve to the off position and stops the flow of water when batteries run out so water is not wasted.Find the WATER TIMER AUTO 3 DIAL at Ace.