Bluetooth wireless connection: the temperature and humidity sensor uses a high-end Bluetooth 5.0 chip. Provides wireless real-time monitoring of temperature -20 - 65 °C (-4 - 150 °F) and humidity (0-100% RH). Can easily monitor temperature and humidity data remotely via Bluetooth in the app, this supports connecting multiple devices simultaneously. Higher accuracy: With the help of an accurate and sensitive temperature and humidity sensor, the Bluetooth thermometer can achieve a temperature error of ±0.5°C (±1°F) and a humidity error of ±5% and can be updated once per second for higher accuracy. Precise measurements allow you to make timely adjustments in your basement, greenhouse or elsewhere. 【Free data storage and export】Support temperature data export function, record a data group every 10 minutes, can store up to 100 days of data. After registering an account, data in CSV format can be downloaded for free. Smart app with notifications: After successful Bluetooth connection, the