Intelligent Watering Computer: The Watering Duration Ranges From 1 Second To 99 Minutes And The Frequency Ranges From 1 Hour To 15 Days.3 Separate Irrigation Systems: The Configuration Of The 3 Independent Irrigation Programs Can Record Your Watering Schedule, Each Irrigation Schedule Can Set A Different Watering Frequency And Watering Time, Allowing You To Adjust The Watering Time More Flexibly And Better Meet Your Needs.Automatic Rain Sensor: The Top Of The Smart Timer Is Equipped With A Rain Sensor Chip. When The Chip Comes In Contact With Rain, It Will Automatically Delay Watering Until There Is No More Water On The Chip.Manual Irrigation And Child Lock: Manual Button Allows Watering Instant And Flexible Without Interrupting Your Set Watering Schedule. Child Lock Can Lock The Timer Can Avoid Accidentally Changing The Programmed Setting.Special Attention: Lithium Batteries Are Prohibited. Two 1.5 V Alkaline Batteries Should Be Used.