1、The air quality monitor can simultaneously detect carbon dioxide concentration, temperature and humidity. 2、The colorful display can display the current carbon dioxide, temperature and humidity data. The color ring changes as the carbon dioxide content changes. 3、You just need to press the power button for 3 seconds to turn it on and off, and it will automatically detect carbon dioxide. 4、With its small size, light weight, it is easy to carry, and can be placed in the kitchen, living room, bedroom or when going out. 5、Using infrared detection technology, the measurement accuracy is good, the performance is stable, and the measurement error is small. 1 x Carbon Dioxide Detector1 x Manual 1 x USB Cable Item Type: Carbon Dioxide DetectorMaterial: ABSWeight: Approx. 205g / 7.2ozDetection Technology: Infrared Detection TechnologyApplicable Temperature: 0~50°CMeasurement Error: ±1°CHumidity Measurement Range: 0% ~ 99% RHHumidity Measurement Accuracy: ±2% RHDisplay Mode: LED Digital Display + LCD Screen + BacklightDetection Range: 400-5000PPMWorking Voltage: 5VProduct Size: Approx. 9x7x4cm / 3.5x 2.8x 1.6inPower Supply: Integrated Lithium Battery 1200mAh (Battery Included)Sensor: Infrared SensorBattery Capacity: 1200MAH, With Power IndicatorCharging Interface: Type-C, 5VCarbon Dioxide Indication:0-799ppm: green flashing800-1199ppm: yellow flash1200-1599ppm: orange flash1600-1999ppm: red flashAbove 1999ppm: four colors flash