Description: CO2 Carbon Dioxide Tester: Multifunction 9 in 1 co2 analyzer testor indoor air quality monitor can detect temperature, humidity, PM2.5, PM10, , , CO, CO2, AQI, you can check the dates you care about at any time. Advanced Technology Built: This air quality teastor adopt semiconductor, infrared, electrochemical, detection technology what is a new type of high sensitive technology that can accurate detect air quality while you can directly to know the overall environment quality and track. Accurate and Convenient: Handheld Carbon dioxide detector features with LCD screen backlight digital screen, easily use and accurate, stably and won't be affected by temperature or other conditions. Range: digital leak detector built in storage for continuous data logging for co2 concentrations, 1s update, range of CO 0-5000PPM, CO2: 400-5000PPM. Built with 1500 mAh large capacity, comes with USB cable, the standby time for long hours. Wide Application: The scope of application of this product: business premises, office, houseware, greenhouse, airports, stations and any indoors. Specification: Material: ABS product Model: Temps/Humidity/PM2.5/PM10///CO/CO2/AQI Proper Temperature: 0-70 ° C Display: LCD screen, backlight Voltage: 5V Charging Port: TYpe c Test: PM2.4 /semiconductor /electrochemical . Examination Range PM2.5: 0-999 PM10: 0-999 CO2: 400-5000PPM Humidity: 0-99 % RH AQI: 0-999 Size Chart: 7cmx15.7cm/2.76inchx6.18inch   Package Includes: 1 CO2 Meter Note: Press the button for 3 seconds to start the test. No calibration is required.