Features:1. 3-in-1: Can function as a carbon dioxide concentration detection, thermometer and hygrometer at the same time.2. Battery power supply: built-in 1200mAh lithium battery, use TYPE-C charging cable to charge it.3. Color screen: the current carbon dioxide data, temperature and humidity. The colored ring will change according to the carbon dioxide content.4. Easy to operate: long press the "on-off" key for 3 seconds on and off. It will detect the carbon dioxide2 automatically.5. Compact and portable: can take in the kitchen, living room, bedroom, or when going out.6. Equipped with a large screen, different font colors display different air quality, green 0-799ppm, yellow 800-1199ppm,Orange 1200-1599ppm,red 1600-1999ppm.7.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.Specifications:Screen type: LCDCarbon dioxide Detection Range: 400-5000PPMCarbon dioxide Detection Sensitivity: 1PPMTemp Measuring Range: 0 ~ 50 CTemp Measurement Accuracy: 1 CHumidity Measurement Range: 0% ~ 99% RHHumidity measurement accuracy: 2% RHCharging Modes: TYPE-C 5VBattery: Built-in lithium battery 1200mAhSize: 9 x 7 x 3cm / 3.54 x 2.75 x 1.18inchScreen: 2.8 inchColors: White/BlackPackage Included:1 X Carbon Dioxide Detector1 X Data Cable1 X ManualNotes:1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object. Brand: Unbranded Category: Air Quality Meters Colour: Black