The popular Rain Bird ESP Series of controllers has been expanded to provide a contractor grade irrigation controller for residential and light commercial applications. The ESP-RZX Controller provides zone based set up that is easier to understand by untrained users. Fixed 6 zone. The ESP-RZX provides flexible scheduling features that make the controller ideal for a wide variety of applications including residential and light-commercial irrigation systems. Easy to Use: The ESP-RZX Controller was designed with ease of use in mind. Zone-based scheduling allows every valve to be scheduled independently. The large LCD display shows all of the programming for each zone at the same time.