ESP-SM6 - 6 Station Expansion Module for ESP-Me and ESP-SMTe Series TimersRain Bird ESPSM6 6 Station Expansion Module for ESP Me and ESP SMTe Series Timers Easily expand your Rain Bird ESP Me or ESP SMTe Series Controller with this 6 station hot swappable module, which can be added without powering down the controller. Modules can be installed in any available slot. Features Adds six additional stations to Rain Bird residential modular controllers Hot swappable 6 station expansion module can be installed without powering