Air Comfort IndicatorThis mini hygrometer thermometer feature 3 types of smile icons, which display the different levels of temperature and humidity simultaneously. When the emoticon is a smiling face, it indicates the best temperature and humidity Multiple Applications This indoor hygrometer thermometer allow you to easily and fast know the environment temperature and humidity around you anywhere. Perfect to use in Reptile, office, bedroom, living room, incubators, brooders, cigar rooms Easy to Read and UseMini hygrometer thermometer work right out of the box without complicated function buttons. The beautiful white front panel has a clear LCD displaying large bold numbers that you can easily read even at a distance. The digital hygrometer thermometer can be placed anywhere in the home or carried outdoors, powered by a CR2032 battery (included). Accurate measurement and quick updateTemperature measuring range: -50C-70C Humidity measuring range: 10 percent -99 percent RH (Measures conditions every 10 seconds)Temperature measurement accuracy: 1 Humidity measurement accuracy: 5 percent RH Product description Specifications Measurement Range of Temperature:-50-70 Accuracy of Temperature measurement:1 Temperature resolution: 0.1 Measurement range of humidity:10 percent RH-99 percent RH Measurement accuracy of Humidity: 5 percent RH Humidity resolution: 1 percent Power supply: CR2032x1 Package include: 2 x Mini Hygrometer thermometer Description of comfort level: Humidity display between 10 percent -39 percent , LCD display UNHAPPY FACE Humidity display between 40 percent -70 percent , LCD display HAPPY FACE Humidity display between 71 percent -99 percent , LCD display UNHAPPY FACE