RAIN BIRD ESP-LXM-SM12 - 12 STATION EXPANSION MODULE:
Expand the circle of influence you have (over the zones in your yard) with the Rain Bird ESP-LXM-SM12. Compatible with the ESP-LX Modular Series of controllers, this expansion module is the fast and easy way to add zones to you existing controller.
The LXM-SM12 is a proud member of the functionally famous ESP line of controllers, which means that it's able to do things that most controllers cannot!
Features like the Contractor Default™ program, generous cabinet space and plug-n-play installation make this expansion module a sure fire winner.