Easy to operate Through the touch screen switch on / off Carbon dioxide reading It takes 30s to complete the initialization of the detector after starting up. In this process, the number will continue to rise according to the room CO2 concentration until the detection is completed. After initialization, please note that due to the flow of , the reading of CO2 in the display is flowing. Battery charging The detector has a built-in 2500mAh battery, which will work for about 24 hours. Please don't worry, our detector can work while charging. Colour:black+white Material:ABS Package Contents: 1 x Quality Monitor 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.