Indoor Digital Hygrometer Wireless 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 Hygrometer Thermometer Data Storage Export supports temperature data export function records a group of data every 10 minutes can store up to 100 days of data A smart device can be connected to up to 100 temperature sensors simultaneously Available to export data in CSV format for free after registering an account Digital thermometer precision sensor Accurate and sensitive integrated temperature and humidity sensor it refreshes once per second to provide more accurate and faster data The temperature error can be 0 5 (1) humidity error can 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) Smart Alert for Reminder Sensor temperature data download 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 door it will have the alert on the device The alert notification will also be sent to your phone Mini design and portable indoor outdoor thermometer 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 may be attracted to magnetic objects Space-saving and handy Easy to install It can be applied in home surveillance domestic animals refrigerators freezers walk-in ice cream parlors wine cellars and greenhouses etc Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.