ESPLXMSM12 - 12-Station Expansion Module for ESP-LX Series ControllersRain Bird ESPLXMSM12 12 Station Expansion Module for ESP LX Series Controllers Features Adds twelve additional stations to Rain Bird ESP LX Series modular controllers Hot swappable 12 station expansion module can be installed without powering down the controller Compatible with Rain Bird ESP LXME, ESP LXMEF and ESP LX Basic series irrigation controllers Can be installed in any available slot Easily expand your Rain Bird ESP LXME or ESP LX Basic Series