3. The information display saves energy, in the event that no one uses it, the screen can be automatically turned off to reduce power consumption, and the sensor can still transmit data to the cloud through when the screen is off, and the real-time value can be viewed through the app. 4. The temperature and humidity sensor is exposed, which is more sensitive to the surrounding environment 2. Automatic brightness adjustment, according to the surrounding brightness, automatically adjust the brightness of the screen so that the screen is visible and not dazzling. 1. Automatic brightness adjustment, automatic calibration, WiFi connection, activation with distance detection 5. High-performance chip, captures the weak current generated during the electrochemical reaction, accurately calculate the results of CO2 measurement, increase useful, improve output efficiency, and effectively improve conversion., Weight: 0.41998060911 Pounds, Manufacturer: Faeymth