【Protect Your Every Breath】: Since clean air means a lot to every one, the Smart Air Quality Monitor will be your best choice. It can accurately monitor CO2, TVOC, HCHO, Humidity, Temperature&PM2.5/10 index. You can monitor the environment at any time, any where via specific application. 【Accurate & Reliable】: Equipped with a fast-responding and sensitive high-performance chip, the air quality monitor can precisely capture the weak currents generated during electrochemical reactions. Dual color & voice alerts keep you informed of the current air 【Safety Design】: The mesh design allows for better heat dissipation during operation, preventing the device from getting hot, and more accurate measurement data. 【Warm Notice】: Please notice that this air quality monitor is designed for indoor spaces, so please close the door & windows before testing. Or else the data may not be accurate. We recommend using the monitor and keeping it working for at least 60 minutes before reading the data.