Intelligent color screen display, clear numbers, easy to identify and read.In the alarm mode, the user is prompted to pay attention to the environment by changing the color.It can monitor and display the concentration of carbon dioxide per cubic meter in real time.It can detect and display the temperature and humidity of the environment to help users understand the environment.It is suitable for offices, homes, gymnasiums and other occasions, with a wide range of applications.It can be charged by USB, charging for 4 hours can be used for 7 hours.It is small and portable, easy to carry, does not take up too much space, and can be installed at home.CO measurement range: 400-6000ppm error: +/- 50 +/- 5%ppmTemperature measurement range: -10~50℃ Error: +/- 1℃Humidity measurement range: 0-99%RH error: +/- 2%Charging voltage: 5V Working voltage: 3.7VCharging current: 500mA Working current: 160mAPower: 0.4WBattery capacity: 1500mAhBare machine size: 89 x 70 x 35mm Weight: 155gColour: black/whiteMaterial: ABSPackage Contents:1 * CO2 detector1 * USB power cord1 * English manualOnly 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.