Control your Rain Bird irrigation system remotely from anywhere in the world! Rain Bird now offers the LNK WiFi Module for Residential and Light Commercial Rain Bird controllers. The New Rain Bird LNK WiFi Module allows easy access and control of a Rain Bird irrigation system from anywhere in the world. With the LNK WiFi Module and Rain Bird’s FREE mobile app, users get access to off-site management, real-time alerts and advanced water management tools via smart phone or tablet. It is designed to work with controllers you already understand – the ESP-TM2 controller