Irritrol's RFS1000 Wireless Rain/Freeze Sensor comes from the Irritrol Parts Series. This product is the sensor/transmitter only, it mounts to a raingutter or elsewhere to monitor precipitation so as to skip watering times on rainy days. This sensor can be used universally with most controller systems. Irritrol has made their name as a brand by selling and marketing exclusively to the professional installer, as a result their products are geared to be dependable and durable. Irrirtrol is now making their products available to you through our website. If you are looking for a product line that will last year in and year out, Irritrol is the brand for you.