It makes more sense to have a Combo Freeze & Rain Sensor than one of each. Rain Bird's WR2 Wireless Rain & Freeze Sensor is designed to exceed customer's expectations regarding a water management system. The WR2 allows you to set how much rainfall needs to fall, and can help you use up to 35% less water. Rain Bird designed the WR2 to be easily installed by a single person. The signal's strength is displayed on the sensor unit and the controller interface. The mounting bracket attaches securely to any vertical surface. The sensor is easy to use and manage. It has an LCD screen that is easy to read and a long-lasting battery. The WR2 also has a safeguard to prevent signal interference. Weather data is updated every 45 seconds to ensure everything is up to date. Check out PoguePoolSpa.com for more blogs on irrigation products.