1Realtime monitoring and realtime display of carbon dioxide concentration per cubic meter. 2It is suitable for offices, homes, gymnasiums and other occasion and has a wide range of applications. 3In the alarm mode, the user is prompted to pay attention to the environment by changing the color. 4Intelligent color screen display, clear numbers, easy to identify and read. 5It is small and portable, easy to carry, does not take up much space, and can be installed at home. 6It can detect and display the temperature and humidity of the environment to help users understand the environment. Item Type: Carbon Dioxide DetectorMaterial: ABSColor: As shown in the pictureSize: Approx. 9x7x3.5cm / 3.5x2.8x1.4inWeight: Approx.236g/8.3ozVoltage: 5VCurrent: 500mABattery: Polymer lithium battery 1500mAh(Included)CO2 Detection Range: 400-6000PPMCO2 Detection Accuracy: 1PPMTVOC Detection Range: 0-2PPMTemperature Measurement Range: -10-50Temperature Measurement Accuracy: 1Humidity Detection Range: 0%-99%RHHumidity Detection Accuracy: 2%RHHow to Use1. Long press the right switch.2. The monitoring data can be seen after the screen is turned on. 1 x Carbon Dioxide Detector1 x Instruction Manual1 x USB Cable 1. Please allow 1& 8209;2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.