Irritrol RS500 Wired Rain Sensor Constant communication between transmitter and receiver - Assures that even after a controller power outage, the controller is continually updated with the sensor's "wet" or "dry" status Versatile mounting options - Requires no special tools - Quick-Clip gutter bracket and 1/2" conduit adapter included Dry-out rate adjustment for reset delay - Allows for setting the ideal dry out time