Remote Monitoring and Alerting: Monitor temperature and humidity remotely from your smartphone. Keep an eye on your home while you're away. The app sends you notifications when data is outside the preset range. High Accuracy and No Interference: Built-in high-precision temperature and humidity sensor. It can accurately measure temperature within a deviation of 0.1 and 3% RH. Plus, it uses radio transmission and encoding technology, with no signal interference. Dual Display Methods: This wireless digital indoor hygrometer thermometer is designed with a clear LCD screen. You can check the current hygrometer thermometer on the LCD screen, or you can get current and historical data via the APP. Free Data Storage: It has 30 days of built-in data storage. You can freely view recent temperature and humidity records. Easily track data with a graph display. Wide Application and ZigBee 3.0 Hub: Widely used for nurseries, bedrooms, wine cellars, greenhouses, offices, pet conditions, etc. This smart sensor needs to work with a ZigBee 3.0 Hub.