Check the listing for details. Rain Bird WR2-RFC Wireless Rain Freeze Combo Sensor - Just whats in the pics. Condition: Used. Listed at 34.99 USD. This wireless rain and freeze combo sensor from Rain Bird is the perfect addition to your watering equipment. Designed for indoor and outdoor use, it accurately detects both rain and freezing temperatures to prevent unnecessary watering and protect your plants from frost damage. With the WR2 model, you can conveniently monitor the weather conditions and adjust your watering schedule accordingly. The sensor is compatible with all Rain Bird irrigation systems and easy to install, making it an ideal choice for any homeowner or professional landscaper. With its reliable performance and advanced technology, this rain and freeze combo sensor is a must-have for anyone who wants to keep their garden healthy all year round.