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. USB Rechargeable Battery: Built-in 700mAh capacity USB rechargeable battery. Application Areas: Home, office,agricultural planting, greenhouse vegetables, production warehouse, raw material processing, , etc. CO2 concentration measurement range:400-5000ppm Display:LCD display Battery capacity:700mAh lithium ion battery Charging :USB Type-C Colour:White Material:ABS Size:85 x 50.6 x 17mm Package Contents: 1 x air quality monitor 1 x usb cable 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.