Wide range of applications: perfect for reptiles, aquariums, poultry, offices, bedrooms, living rooms, incubators, brooders, cigar rooms and any other places where temperature and humidity levels need to be monitored. Power supply mode: button battery power supply, digital electronic thermometer and hygrometer used to measure indoor temperature and humidity. Small and practical: This product is small and easy to carry, does not take up too much space, and consumes low energy. This 2-in-1 indoor thermometer allows you to quickly and easily know the ambient temperature and humidity of any place around you. Measurement range: The temperature measurement range is -50°C~70°C, 10%RH-99%RH, and the sampling period is eight seconds Accurate accuracy: temperature measurement accuracy is +/- 1C (at normal temperature), humidity measurement accuracy is +/- 5%.