Automate your drip system and enjoy worry-free watering with the 25 Pot Watering Kit. Programming your watering schedule is easy with the simple, straightforward 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.