From the Manufacturer
The world’s best selling freeze protection product now has wireless sensors. Now you can easily and affordably monitor an entire home or building with multiple temperature sensors. Each base station can accommodate up to 10 total wireless "smart" temperature sensors. Each sensor has its own ID, so when the alarm calls you, you’ll know exactly where the temperature problem is. Adding sensors is "plug and play" simple, with no dip switches to change. "Smart" sensors allow for multiple systems to be in close proximity to each other, preventing false alarms from a neighbor’s system.
Product Description
The Protected Home wireless freeze alarm has wireless sensors to enable you to easily and affordably monitor an entire home, building or multiple freezers and refrigerators, using one main base station and multiple wireless temperature sensors. Base station can accommodate up to 10 wireless sensors. Each sensor has its own ID, so when the alarm sounds, you'll know exactly where the temperature problem is. U.S.A. Common Usage: Wireless freeze alarm sensor, Compatible With: Individual freeze sensors, Thermostate Range (deg F): 30 - 150, Includes: (1) Base station, (1) Temperature sensor