Wireless APP Control: Bluetooth 5.0 Thermometer Hygrometer uploads data to APP when connected via Bluetooth. You can check the max and min values of temperature and humidity on APP from your phone. You can set the temperature and humidity monitoring range, and the value on the app will turn red when out of range. The alert notification will also be sent to your phone. Sensitive and Accurate: Indoor Thermometer with accurate and sensitive temperature and humidity sensor. Temperature error can be 0.5 (1), humidity error can be 5%. It refreshes once per second to provide more accurate and faster data. Export Data Storage: Indoor thermometer digital hygrometer will save data every 10 minutes to the APP, which represents a total of 100 days. Portable Design: Indoor Thermometer Smaller than others (35x 35 x 16mm). Space-saving and portable. A hanging hole is designed for various locations as you like. It can be used for about 200 days with one CR2477 battery. Wide Applications: Bluetooth digital hygrometer can be widely applied in monitoring home, office, kitchen, living room, humidor , guitar case, bedroom, wine cellars, greenhouses as well as musical instruments. It can monitor temperature and humidity changes in real time. Product Wireless thermometer hygrometer, easily monitor temperature and humidity data remotely in app via Bluetooth. Note: This product is the Bluetooth version (not Wifi version) Please note that the connection distance in the home is normally less than 2m. Thermometer Hygrometer Bluetooth support the distance between mobile phone and transmitter 50 meters without barriers, The specific connection signal strength depends on the obstacle environment at the middle Please turn on Bluetooth on your phone and make sure your mobile phone is closer to the device when pairing. When the hygrometer thermometer only displays the humidity, the humidity may not have changed in the current period. There is a vent behind the hygrometer thermometer, please note that in order not to block it. For example: do not hang it on the wall. Data storage export: Support temperature data export function, save a group of data every every 10 minutes, can store up to 100 days of data. Features: Compact and lightweight Effortless setup Beautifully designed app Powerful storage Temperature/humidity alert 100 days data logging Bluetooth sends data to the application when back Features: Temperature Range: -20-65 (-4-150) Deviation: 0.5 ( 1) Humidity Range: 0-100% RH Deviation: 5% RH Mini and Portable Design: Wireless Thermometer Hygrometer Small size (35 x 35 x 16mm) and low power consumption, built-in CR2477 battery. Bluetooth device: The smart Bluetooth app supports up to 100 Bluetooth thermometer hygrometers. Bluetooth 5.0 temperature and humidity meter, wireless real-time monitoring