Hunter Wireless Rain Clik TRANSMITTER ONLY Wireless Rain-Click can command a controller to shut off right when it starts to rain The Rain-Click can be mounted on an eave or any flat vertical surface like a wall or fence A gutter mount is also available that allows for easy installation of the Rain-Click on the edge of a gutter If the Wireless Rain Sensor transmitter needs replacement and the unit has a wire antenna (about 4-5 inches long) you will need to replace both the sensor and the receiver with the WR-CLIK.