The ThermoPro TP359W features Swiss-made Sensirion high-precision sensors to give you the most accurate readings on the market. It will read and record the every minute changes in temperature and humidity that you will be able to adjust your thermomstat or humidistat. When the temperature and humidity levels move beyond your preset range, the hygrometer will instantly send a notification via the smart app. With a strong and reliable Bluetooth conncection of up to 260ft, you will never need to worry about being out of range. | Thermopro | | TP359W Smart Bluetooth Indoor Thermometer and Humidity Monitor, 260ft Wireless Range, iOS/Android Compatible | Black | Best Buy