Portable CO2 Concentration Detector Hand Held CO2 Detector With Temperature And Humidity / Alarm Air Quality Monitor Watch Winders 5mm AUX USB flash drive

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Portable CO2 Concentration Detector Hand Held CO2 Detector With Temperature And Humidity / Alarm Air Quality Monitor Watch Winders 5mm AUX USB flash driveShips FREE Handling Day: 1 3 Days, Arriving Day: 15 35 Days[SHORTDESCRIPTION] Instrument * 1 manual * 1 warranty card * 1 Features: Advanced carbon dioxide tester Air quality monitor A large screen displays CO2 concentration, temperature and humidity at the same time Use of non dispersive infrared sensor Manual calibration is recommended It will alarm when the carbon dioxide is too high Backlight function, convenient for normal use in dark areas Long