Various rooms in the home will reach a desired comfortable level more quickly than others. In most homes a single thermostat senses the temperature in one room but controls the entire property, leaving certain rooms either to warm or not warm enough! By installing the ‘ Heatmiser Wireless Air Sensors’ throughout the home, you can calculate & average temperature, thus allowing for better control which can help to play an important part in reducing energy consumption. You can also use a ‘ Wireless Air Sensor’ instead of utilising the on board temperature sensor within the ‘ Heatmiser Thermostat’*. This is ideal when the thermostat* is not installed in the desired area for measuring temperature. The Wireless Air Sensor is compatible with the edge thermostat series. Up to 16 air sensors can be paired to a single edge thermostat, creating an average temperature reading. *assuming no window/door sensors are paired. Range 40 metres RF Frequency 868 MHz IP Protection IP20 Weight (inc battery)