Smart watering computer: Watering duration varies from 1 second to 99 minutes and frequency from 1 hour to 15 days.3 separate irrigation systems: The configuration of the 3 independent irrigation programs can save your watering plan. Each irrigation program can set a different watering frequency and watering time, allowing you toto 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 into contact with rain, it will automatically delay watering until there is no more water on the chip.Manual irrigation and child safety: The manual button allows for instant and flexible watering without interrupting your set watering schedule. The child lock prevents accidental changes to the programmed setting.Important: Lithium batteries are prohibited. Two 1.5V alkaline batteries must be used.