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1. Temperature, humidity, carbon dioxide concentration values 2. Three levels of carbon dioxide concentration detection, normal (1-700PPM), warning (700-1500PPM), dangerous (1500-5000PPM) 3. Applicable to a variety of scenarios, real-time monitoring, in the car, public places, offices, bedrooms 4. Easily grasp the current environmental carbon dioxide concentration value 5. Temperature/humidity dual detection, cold, warm, dry and wet, clear at a glance 6. Audible alarm, alarm bell + indicator light 7. Back hook, easily fixed in the air 8. The USB port on the back can be used for multiple charging 9. Three ventilation holes, which can dissipate heat and sense 10. Measuring range: 40 square meters 11. Temperature range: -10 to 40 degrees Celsius 12. Battery capacity: 2400mah 13. Power supply mode: TYPE-C/USB-C charging/built-in lithium battery 14. Charging voltage: 5V/1A 15. Dimensions: 98 x 90 x 40mm
