Multifunctional Air Quality Detector:It can accurately detect the current air concentration of carbon dioxide (), temperature () and humidity (RH). It can help you understand the indoor air quality and a safe environment for your home.CO2 concentration :This CO2 detector is designed with three different CO2 concentration - normal stage (400-999ppm), warning stage (1000-1999ppm), and dangerous stage (2000-5000ppm).Convenient calibration:The carbon dioxide detector is plug and play, with a built-in accurate air quality infrared (NDIR) sensor, it only takes of initialization after touching the switch to stable and accurate data. Meanwhile, you can connect any 5V adapter to support charging while working.Rechargeable Battery Power:Air quality monitor comes with Type-C cable and built-in 2500mAh - battery with up to 24 hours of battery life, supporting long time continuous use.The and clear LED display is designed to increase the brightness of the displayed data can see it clearly.Wide Applications:This portable CO2 tester is and easy to carry, it can be used in grow rooms, offices, kitchens, schools, kitchens, bedrooms, cellars and .Note: The carbon dioxide level in the air is not a fixed data, it changes at any time within a certain range, so the reading on the display fluctuates.Display : 2.8inch TFT LCD color screen digital displayDetection for CO2: Infrared (NDIR) sensorSampling time: 1.5 secondsDetection Temperature: -10F to 50FMeasurement Accuracy: 1FRelative Humidity: 20% - 90%Measurement Accuracy: 5% RH(20%-90%)Storage Temperature: -10C to 60CMeasuring Range: 400-5000PPMMeasurement Accuracy: 15%Resolution: 1PPMPower Source: Lithium battery with 2500 mAh capacityChargeTime: 1 hoursStandby Time: 24 hoursColour:blackMaterial:ABSSize: 118 x 61 x 26mmPackage Contents:1X Multifunctional Air Quality Detector1X USB cable1X English manualOnly 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.