Easily expand your Rain Bird ESP-Modular, ESP-Me, ESP-SMT or ESP-SMTe Series Controller with this 3 station hot-swappable module, which can be added without powering down the controller. Modules can be installed in any available slot.
Adds three additional stations to Rain Bird residential modular controllers
Hot-swappable 3-station expansion module can be installed without powering down the controller
Compatible with Rain Bird ESP-M, ESP-Me, ESP-SMT and ESP-SMTe series irrigation controllers