What's in the box:

3 in 1 Carbon Dioxide Detector Air Quality Monitor Temperature Humidity Air Analyzer 2pcs for CO2 Digital CO2 Meter for Home Office (Grey)

Features:
Color screen display: The color screen display makes it easier for you to read and identify in darkness.
Wide application: The portable size enables you to take it anywhere you go. It can be used at the home, office, shopping mall, hotels and etc.
3 in 1: It can detect real-time CO2 concentration, humidity, and temperature. CO2 detection range: 400-6000PPM. Temperature detection range: 0-50. Humidity detection range: 0-99%RH.
CO2 detector: The color ring will change according to the current CO2 concentration.
USB charging: Connect the power supply and then it will start to work.
Any problems, feel free to contact us. Honor to serve you!

Specifications:
Name: CO2 Meter
Color: Black
Material: ABS
3in1 Detector: CO2 Concentration/Temperature/Humidity
CO2 Detection Range: 400-6000ppm
CO2 Accuracy: 1ppm
Humidity Accuracy: 2%RH
Power: 0.4W
Battery: 3.7V 1500mAh
Charging Time: 2-3h
Work Time: 6-7h
Size: 89*70*35mm

Package information:
Size: 14.1*9.8*10cm
Weight: 340g

Packing List:
2* CO2 Meter
1* Charging Cable
1* Instruction