Description Wireless App Control: The Brifit Bluetooth 5.0 Hygrometer Thermometer uploads data to the app when connected via Bluetooth. You can check the maximum and minimum temperature and humidity values on the mobile APP. You can set the temperature and humidity monitoring range, and the value on the APP will turn red when it exceeds the range. Alert notifications will also be sent to your phone. Sensitive and Accurate: Indoor thermometer with accurate and sensitive temperature and humidity sensor. Temperature error is 0.5C (1F) and humidity error is 5%. It refreshes every second to provide more accurate and faster data. Exported data storage: Indoor temperature meter and hygrometer save data in the APP every 10 minutes for a total of 100 days. Portable Design: Brifit room thermometer is smaller (35 x 35 x 16mm) than other thermometers. Space-saving and portable. The hanging holes are designed for different positions as you like. A single CR2477 battery lasts about 200 days. Wide Application: Brifit bluetooth digital hygrometer can be widely used to monitor home, office, kitchen, living room, the cigar humidor, the guitar case, the bedroom, the wine cellar, the greenhouse and the musical instruments. It can monitor temperature and humidity changes in real time.