2 Set of Air quality detector: 1 set x white Air quality detector & 1 set x black Air quality detectorCarbon dioxide detector: Smart carbon dioxide value tester gas analyzer uses air semiconductor TVOC sensor to monitor temperature and humidity of air quality.It is a high-quality air quality detector, using a good-quality electrochemical detection module, with good accuracy, stable percompatible withmance, strong anti-interference ability, low consumption and long service life. Accurately detect carbon dioxide. The large screen displays power, CO2, temperature and humidity.Adopt electrochemical detection module of high quality, with good accuracy, stable percompatible withmance, strong anti-interference ability, low consumption and long life of the cabinet.The product does not need calibration, it can be tested after booting, and it can accurately detect carbon dioxide.The large screen displays the power, CO2 value, temperature and humidity.Equipped with a large screen, different font colors display different air quality, green 400-450ppm, blue 451-700ppm,Purple 701-1000ppm, yellow 1001-2000ppm, red 2001-5000ppm.Hundreds of ventilation holes at the rear not only accelerate the convection between the air and the machine, thereby realizing effective detection, but also provide a good heat dissipation effect.Type: 5-IN-1Screen size: 2.8 inchesScreen type: TFT-LCDScreen material: glassScreen resolution: 240 x 240Response time: less than 1sTest temperature range: -10 Celsius to 70 CelsiusHumidity test range: 0-99%RHpower supplyWorking voltage: 5V/1A adapter chargingMaximum power: charging current 600mA3.7V lithium battery power supplyBattery capacity: 1200mAhBattery type: lithium batteryCharging method: USBCharging time: 1 hourColour: white+black Material: ABSPackage Contents:2 x Air quality detector2 x CableOnly the above package content, other products are not included.Note: Light shooting 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.