Spring Special $190Upgrade your Rainbird ESP controller to a WiFi controller that can then be controlled by any WiFi connected device anywhere in the world. This means smartphone control and programming from anywhere and as a bonus you will be able to use ET (Evapotranspiration rates) to automatically adjust the timing based on weather conditions. The Rainbird ESP WiFi controller will lower the watering rates based on rain and/or moisture levels in the air thus saving you water and money. Let us know if you have any questions.