Irritrol RFS1000 Wireless Rain/Freeze 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 Signal strength indicator - Ensures correct installation, communication link and signal integrity (wireless models) Patented wireless technology - Unsurpassed by the competition