Watering your lawn just got a lot more high tech and convenient thanks to the Rain Bird ESP TM2 & ESP Me Controller LNK WiFi Plug In Module. With this WiFi module, you can control your sprinkler timer system no matter where you are. Use this simple, plug in module with compatible controllers (not included) and enable WiFi access. Download and use the Rain Bird mobile app and use in conjunction with the wireless to give yourself convenient access, as well as real time alerts and management tools. Not only can you set, monitor, and make changes to watering schedules, you can reduce water usage by 30% with weather adjustments too.