High-Quality CO2 Detector: This portable CO2 meter uses an advanced NDIR sensor to detect carbon dioxide through infrared sensing technology, with high precision, strong anti-interference and excellent stability

CO2 Concentration Level: There are three indicator lights on this carbon dioxide monitor - green light for good (400~699ppm), yellow light for medium (700~1499ppm), red light for danger (1499~5000ppm)

Audible Alerts & Custom Alert Values: When the detected CO2 concentration exceeds 1500ppm, the device will also send out an alarm to remind you. And the CO2 alarm value is customizable

Portable and Long-Lasting: Small and portable, the included lanyard allows you to take this portable CO2 sensor anywhere. Built-in 1000mAh lithium battery, it can be fully charged within 3 hours, and the battery life is about 72 hours

HD Full-Color LCD Display: Full-color LCD display, clear and easy to read, eye protection. If there is no operation for 5 minutes, it will automatically enter the energy-saving ECO mode

Wide Application: Contains 1x CO2 detector, 1x lanyard, 1x 2m charging cable and user manual. This portable CO2 monitor is suitable for home, office, grow tent and more

NOTE: We recommend that when using the detector for the first time, place the device in an open and uninhabited environment and manually calibrate it once to avoid inaccurate readings