Wireless Temperature Sensor-- The Bluetooth V5.0 temperature sensor offers you a temperature range of -20~65 (-4~150 ) and a humidity range of 0~100 RH. Easily monitor temperature and humidity data in the Sensor Blue app via Bluetooth. Real-time wireless monitoring keeps everything under control. . Accurate Sensor-- With the sensor, it provides more precise monitoring. The temperature is accurate within 0.5 1) and the humidity is 5% RH. It is basically updated once per second, so the measurement is more accurate. . Multifunction Thermometer-- You can view the minimum and maximum temperature and humidity by connecting with Free APP via Bluetooth 5.0. You can also set the temperature and humidity monitoring range. The value in the app will turn red when out of the monitoring range and send a reminder to you. The thermometer records a data set every 10 minutes and also supports the export of temperature data. . Just pair the device-- After pressing the pair button on the Bluetooth thermometer, it will automatically connect. When you need to connect multiple sensors on one APP, the pairing button can help you understand the corresponding Bluetooth thermometer clearly without causing confusion. It is convenient to add bluetooth sensors. . Wide Compatibility Precautions-- The Bluetooth thermometer supports Android 4.3 and above / ios 4s and above phones, which could be used with wide compatibility. Smart Bluetooth app can connect up to 100 at the same time. When the mobile phone receives data from the thermometer, the distance to the sensor should be within 30 meters without any obstacles. .