EBayNEW Hygrometer Thermometer, Wireless Thermometer, Mini Bluetooth Humidity Sensor Smart App Control: Easily monitor temperature and humidity in real-time on the app. 262Ft connecting distance (no obstacles) allows you to quickly get data remotely from anywhere in your home. (Not WiFi Version) Accuracy: With a built-in Swiss-made sensor, the temperature is accurate to ±0.54°F and humidity is ±3%RH. Enjoy precise data from the hygrometer thermometer every 2 seconds. Data Storage & Export: Featuring 20-day on-board data storage, you can get recent temp & humidity records through curve graph. Press "Export Data as CSV" on the app to export the last 2 years' data to your phone. Mini Compact Size: With a smaller & compact design, this space-saving device is lightweight and portable. And you can place it at multiple locations by the hanging hole. Prompt Alert Notification: Set preset temp and humidity ranges with the Home App, and if levels fall out of that range, you'll receive a notification instantly.