Monitor CO2 Carbon Dioxide concentrations Triple LCD simultaneously displays CO2, Temperature and Humidity Visible and Audible CO2 warning alarm when concentration level exceeds high or low user set point Min/Max CO2 value monitor Desktop or wall mount Complete with Universal usb cable WHAT IS THE IMPORTANCE OF CO2 MONITOR? CO2 is not an air pollutant, but it can still have a negative effect on us when levels are too high. When levels rise, we tend to get sleepy and have trouble focusing, and some people even develop headaches. For this reason, it is important for occupants to have CO2 monitor to stay at a healthy level. Colour:White Material:plastic Package Contents: 1 x Air Quality Detector 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.