USB Digital Carbon Dioxide Detector Multifunctional Air Quality Detector Thermometer Hygrometer

High precision: Measuring range:400-5000ppm, accuracy:±(5%+50ppm), the resolution is 1ppm, provides you with accurate data.
Multifunctional: 3 in 1 functions, the machine can be used as a carbon dioxide detector, a thermometer and a hygrometer, practical and powerful.
Environment detecting: This machine helps to monitor the room air quality and environment, reminds you to open the window to get your room ventilated, make you live healthily.
Screen display: Digital screen display, large digits make it easier to read.
Portable: Compact and lightweight, suitable for use in everywhere and portable for carrying.