The Automatic Yard Watering System (sold separately) installs in just minutes and gives you the freedom of remote watering without the expense of professionally installed in-ground systems. The Automatic Yard Watering System comes with two leak-free valves. By adding the Extra Valve for the Yard Watering System, you'll be able to irrigate another section of your yard at its own schedule. Connect the Extra Valve to the Automatic Yard Watering System and attach a garden hose to its other end. That's it! You're now ready to set the timer to turn the water on as often and for the duration of time you designate for another section of your yard. The Automatic Yard Watering System offers a flexible watering schedule, configurable for each of the four stations. Choose the weekdays you want to water. You can water every day, only certain days, or every second or third day, starting at the time you designate. You can also set the amount of time you water each area, up to 99 minutes in length, and you can easily add extra time to your scheduled watering duration during a heat wave. Possible rain in the forecast? Delay your automatic watering schedule up to 24 hours.