TFA Accuracy Thermo-Hygrometer BK, Precision thermo-hygrometer, For monitoring and controling the temperature and humidity indoors for a healthier living environment, With colour-coded zones, Precise synthetic-hair hygrometer, Glass cover plate, Does not require batteries, Temperature: -15°C up to +55°C, Humidity: 0 up to 100%, Dimensions: Ø 120 x 37 (68) mm, Weight: 93 g