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Rain Bird ESP4Me 6 Station Expansion Module Rain Bird ESP4Me (ESP-SM6) 6 Station Expansion ModuleFeatures & BenefitsThe Rain Bird ESP Irrigation Controller and Timer was engineered with maximum productivity in mind, therefore saving the consumer money and time. The Rain Bird ESP-SM6 expansion module is built tough and simply to be an easy and quick means of expanding your ESP-4Me Controller. It is "hot-swappable" so it can be installed at anytime without requiring a shutdown or restart, so there is no risk of losing your watering schedules. This is a MODULE ONLY - Use as an add on to your existing ESP Controller from Rain Bird - Adds 6 stations to your existing Controller. Controller NOT included.NOTE: Features and Benefits listed below are descriptive of the ESP4ME controllers not the individual module sold on this page.More Reliable NEW! 5-year lithium battery (Rain Bird Exclusive) and non-volatile memory; keeps time; date and program schedule in case of power outage. Superior surge protection - withstands nearly 3 times higher electrical surges than competitive controllers. Rain Bird quality construction and components. Fuseless; diagnostic circuit breaker identifies a station with valve or wiring problems and continues to water operable stations.More Flexible Easily expandable from a four station base model to 13 stations with the addition of 3-station modules at installation or in the future. Modules can also be installed in any available slot. NEW! Longer station run times add more flexibility for special applications such as drip. NEW! Programmable master valve allows pump to operate only as needed; resulting in greater flexibility in controlling the water source. NEW! Programmable Delay Between Stations allows additional time between zones for water well recovery or slow closing valves. Auxiliary Station can be set to bypass an active sensor to allow watering even if the other stations are disabled or can be set as a normal station. 365-day with lea