Features: 1.Real-time monitoring and real-time display of carbon dioxide concentration per cubic meter. 2.It can detect and display the temperature and humidity of the environment to help users understand the environment. 3.It is suitable for offices, homes, gymnasiums and other occasions, with a wide range of applications. 4.Intelligent color screen display, clear numbers, easy to identify and read. 5.In the alarm mode, the user is prompted to pay attention to the environment by changing the color. 6.It has a long service life and can be charged with a USB cable. 7.It is small and portable, easy to carry, does not take up too much space, and can be installed at home.Notice:Actual color may be slightly different from the image due to different monitor and light effectPlease allow 1-3cm deviation due to manual measurement 1.Material: ABS 2.Measurement accuracy: 1ppm 3.Measuring range: 400- 60004.Working voltage: 3.7V 5.Current: 120mA 2CO6, NDIR, 190 2CO5, TVOC 6.Power: 0.4W 2CO6, NDIR, 0.7W 2CO5, TVOC 7.Battery: 3.7V, 1500mAh 8.Product size: 94* 94*30mmPackage List:1* CO2 detector1*USB cable1*Manual1*Wall suction bracket2*wall-sticking metal sheets2*self-adhesive paste