【High Accuracy and Calibration】This room thermometer hygrometer provides high accuracy data, with temperature accuracy of ±0.3°C/±0.5°F and humidity accuracy of ±2% RH. You can calibrate the temperature and humidity to adjust readings to your desired values. Temperature data is uploaded to the app, allowing you to monitor conditions on your smartphone. Historical temperature and humidity data are displayed in graphic charts within the app. Alert notifications are sent to your smartphone when temperature or humidity levels exceed preset ranges. 【LCD Display】The thermometer hygrometer displays real-time temperature and humidity readings, along with maximum and minimum values on the LCD screen. A low battery indicator and three comfort indicators—DRY, COMFORT, WET—help you maintain a comfortable indoor environment. 【Data Storage and Export】Supports temperature and humidity data logging and export. You can set a time interval for data recording, with storage capacity for up to 20 days of data. Data can be exported to your phone in CSV format. Notifications are sent every 10 minutes when temperature or humidity falls outside the set range. 【Wide Applications】This Bluetooth digital hygrometer is suitable for use in homes, offices, kitchens, living rooms, cigar humidors, guitar cases, bedrooms, wine cellars, greenhouses, and for monitoring musical instruments. It enables real-time monitoring of temperature and humidity changes.