[Wireless App Control] - The temperature sensor uploads data to the app when connected via Bluetooth. You can check the maximum and minimum temperature and humidity values in the app from your phone. Smart devices such as mobile phones can connect up to 100 temperature sensors at the same time. [High-Accuracy Sensor] - A built-in MEMS sensor that updates every second to provide more accurate data and faster. The temperature error can reach ±0.5℃ (±1℉), and the humidity error can reach ±3%. Equipped with a Bluetooth 5.0 chip, the temperature sensor offers wireless real-time monitoring of temperature (-20 - 60°C) and humidity (0 - 100% RH). The connection distance is up to 50 meters (164 feet) (in open area). [Smart Reminder Alert] - The app data turns red to alert you and your family of changes in temperature and humidity, and make adjustments over time when the data exceeds the preset values. An alert is sent to the app. It can be applied to home monitoring, pets, refrigerators, freezers, walk-in refrigerators, wine cellars and greenhouses, etc. [Data storage export] - The thermometer - wireless hygrometer records data in the app every 10 minutes for a total of 100 days. [Size]100*60*22mm [Package includes] thermometer *1, pin *1, instructions *1