Real-time monitoring and real-time display of CO2 concentration per cubic meter.It can detect and display the temperature and humidity of the environment to help users understand the environment.It is suitable for offices, homes, gyms and other settings with a wide range of applications.Smart color screen with clear numbers, easy to identify and read.In alarm mode, it alerts the user to the environment by changing the color.It has a long life and can be recharged via USB cable.Compact and portable size, easy to carry, will not take up too much space and can be installed in the house.Measurement accuracy: 1ppmMeasuring range: 400-6000Operating voltage: 3.7VCurrent: 120mAPower: 0.4WBattery: 3.7V, 2400mAhSize: 90 x 90mm / 3.54 x 3.54inColour: blackMaterial: plasticPackage Contents:1 * Carbon Dioxide Detector1 * USB lineOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.