Fangrui Product Details 1. Pth-9c Gas Detector Infrared Carbon Dioxide Detector Temperature And Humidity Meter 2. Temperature, Humidity, Carbon Dioxide Concentration Values 3. Three Levels Of Carbon Dioxide Concentration Detection, Normal (1-700ppm), Warning (700-1500ppm), Dangerous (1500-5000ppm) 4. Applicable To A Variety Of Scenarios, Real-time Monitoring, In The Car, Public Places, Offices, Bedrooms 5. Easily Grasp The Current Environmental Carbon Dioxide Concentration Value 6. Temperaturehumidity Dual Detection, Cold, Warm, Dry And Wet, Clear At A Glance 7. Audible Alarm, Alarm Bell + Indicator Light 8. Back Hook, Easily Fixed In The Air 9. The Usb Port On The Back Can Be Used For Multiple Charging 10. Three Ventilation Holes, Which Can Dissipate Heat And Sense 11. Measuring Range: 40 Square Meters 12. Temperature Range: -10 To 40 Degrees Celsius 13. Battery Capacity: 2400mah 14. Power Supply Mode: Type-cusb-c Chargingbuilt-in Lithium Battery 15. Charging Voltage: 5v1a 16. Dimensions: 98 X 90 X 40mm