Mini Air Quality Monition:It is small and easy to carry,can be carried around as a decoration, you can check air quality anywhere anytime. CO2 Detector: Built-in high-performance co2 sensor,using more professional infrared optical principles to accurately and quickly detect carbon dioxide.If the carbon dioxide concentration exceeds 1000ppm, an alarm will be issued immediately. Real-time Monitoring of CO2 Concentration:The screen will automatically turn off without any active within 5 minutes,will be standby mode.And short click to view the CO2 concentration,the screen display lasts for 1 minute. USB Rechargeable Battery: Built-in large capacity USB rechargeable battery,Charging takes only 2.5 hours,12h long working time. Application Areas: Home, office,agricultural planting, greenhouse vegetables, production warehouse, raw material processing, home interior, etc.If you have any questions, please contact us and provide you with the best service at any time. Colour:White Material:ABS Package Contents: 1 x CO2 detector 1 x usb cable 1 x English manual Only the above package content, other products are not included. Note: Light reflection 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.