Wireless App Control: 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 data more precise and faster. Storage of exported data: Indoor temperature meter and hygrometer save data in APP every 10 minutes for 100 days in total. Portable Design: The 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. Single CR2477 battery lasts about 200 days. Wide Application: Brifit bluetooth digital hygrometer can be widely used to monitor home, office, kitchen, living room, cigar humidor, guitar case, bedroom, wine cellar, bathroom, etc. greenhouse and musical instruments. It can monitor temperature and humidity changes in real time.