Ensure optimal air quality with the TRIPLETT GSM215 Desktop Indoor Air Quality CO2 Meter. This versatile tool, ideal for homes, offices, schools, malls, fitness centers and other public areas, provides simultaneous readings of CO2, temperature and relative humidity, thanks to its advanced NDIR sensor. Its dual-mode design allows for both desktop and wall-mount use, while the EBTN display enhances visibility. A dynamic 3-color light bar reacts to CO2 concentration changes, giving you instant insights. Powering the device is a built-in rechargeable battery, conveniently charged via USB sources. Includes a USB charging cable and a 1-year warranty for peace of mind.