Add an extra temperature sensor to your Aercus Instruments WeatherMaster. One comes supplied with the display, but you can add seven more to gather temperature and humidity information in other rooms such as a garage, greenhouse, cellar or kid's bedroom. Simple to set up.
Frequency: 868MHz (UK/EU), 915MHz (AU/NZ)
Channels: 8 selectable
Remote sensors: 2 x AA 1.5V Alkaline batteries (not included)
Battery life: Up to 24 months for thermometer-hygrometer sensor (use lithium batteries in cold weather climates)