The ESP-Site Satellite controller is the most versatile satellite controller yet. This controller combines the capabilities of the Cluster Control Unit (CCU) with all the power of an ESP-SAT controller. Powerful enough for large sites yet flexible for smaller applications. It also has all the features and stand-alone capabilities of Rain Bird’s ESP-MC controller line. Four programs, a real-time calendar, Rain Bird’s exclusive Cycle+Soak™ water management feature, and the best customer satisfaction program in the industry, helping you conserve both water and money.