The Hunter Rain-Clik Wireless Rain Sensor has a rugged polycarbonate housing design with a metal extension arm to collect rain. The innovative device of the Rain-Clik Wireless Rain Sensor has built-in Quick Response technology, shutting the device off at the first sight of rain, saving the unnecessary waste of your water. In addition, the device will shut off if the temperature plummets to 3degrees. Thanks to Hunter’s sophisticated sensor mechanism the device won’t mistake debris for water, giving you a more accurate operation time and time again. The receiver can be attached to your irrigation controller while the installation of the transmitter can be attached in a variety of locations that’s to the wireless technology. Try attaching the transmitter to a fence, gutter, wall, or any vertical surface where it will receive representative rainfall.