Rain Bird® ESP-Modular Controllers are simple to program, making it easy to monitor and adjust watering schedules based on your landscape’s diverse watering needs. The controller can expand to 13 stations and has three independent programs. The multiple programs allow flexibility to accommodate different plant watering needs and areas of the lawn and garden that receive varying amounts of sun or shade, saving water and money. Each program can have multiple start times, allowing for running programs several times a day for shorter durations to maintain a healthier lawn and garden. The modular design allows for easy expansion of the controller's capabilities if the watering needs of the landscape change in the future. The water budget feature enables easy adjustment of watering schedules without re-programming. The built-in 5-year lithium battery keeps time, date, and watering schedules intact during power outages, providing worry-free operation.