Wireless App Control We uses a high-end Bluetooth 5.0 chip and can easily monitor temperature and humidity data remotely on app via Bluetooth. (free downloading from App Store and Google Play).Higher Accurate MonitorUsing an accurate and sensitive temperature and humidity sensor, it can achieve a temperature error of 0.5(1), a humidity error of 5%, and refresh once per second for higher accuracy.Data Storage ExportSupport temperature data export function, record a group of data every 10 minutes, can store up to 100 days of data. Available to download data in CSV format for free after registered account.Smart Notification AlertAlert notification will be sent to your phone once temperature or humidity is out of preset range. Intelligent function enables you to adjust situation of your wine cellar, greenhouse or other places in time.