Tracks air quality using Suisse Co2 filter. Measures - Thermometer - 14 deg. F to 122 deg. F and -9.9 deg. C to 50 deg. C , Hygrometer - 5-97 percent , Voc Range - 5-999mg/m3, Co2 Meter - 4000-999ppm. It features a clear digital display showing temperature, humidity, and time, with customizable settings for alerts and backlight brightness. Powered by a rechargeable battery or USB connection. | Taylor | | Air Quality Meter | Best Buy