The Rain Bird ESP-ME3 series controller has been designed for high end residential and small commercial irrigation systems. This evolution on the ESP-ME series controller gives the controller a few new features; now allows for the connection of a flow sensor giving it the ability for flow monitoring and has a large backlit LCD display making programming at the controller easier than ever before. It is LNK Wi-Fi compatible that allows for access to this controller via the internet, using your smartphone and the LNK Wi-Fi module (sold separately). It is expandable from 4 to 22 stations using the 3 or 6 station modules allowing it to cover almost all requirements.