Wireless Indoor Digital Hygrometer APP Control. The Temperature Sensor uploads data to APP when connecting via Bluetooth. You can check the max and min values of temperature and humidity on APP from your phone. Support 35m distance between phone and transmitter without obstacles.Data Storage Export The wireless hygrometer thermometer will log data every 10 minutes. which is total up to 100 days. Available to download data in CSV format. A smart device (such as your phone) can be connected to up to 100 temperature sensors simultaneously.Smart Alert for Reminder The temperature sensor uploads data to the app when connecting via Bluetooth. You can check the maximum and minimum values of temperature and humidity on APP. The sensor with the sound alert on the device. if the temperature or humidity is out of range. it will have the alert on the device. The alert notification will also be sent to your phone.Precision Digital Thermometer Sensor. Accurate and sensitive built-in temperature and humidity sensor. it refreshes once per second to provide more accurate and faster data. The temperature error may 0.5 (1). the humidity error may 5%. Bluetooth 5.0 chip adopts. The temperature sensor provides real-time wireless monitoring of temperature (-20-60 )/-4-140 and humidity (0-100 RH).Mini and portable indoor thermometer design . The wireless humidity sensor is smaller than the others. Measures 1.79 x 1.79 x 0.47 inches There is a magnet on the back. which can be attracted to magnetic objects. Space-saving and handy. Easy to install. It can be applied in home monitoring. pets. wine cellars and greenhouses. etc.