Tilswall 3-in-1 Indoor Air Quality Monitor Portable CO2 Monitor

Uses high accuracy semiconductor sensors, with stable working performance, can accurately detect carbon dioxide valueLarge LCD display, 3in1 design, you can see the carbon dioxide concentration, real time temperature and humidity data clearlyAdopts air convection design, which can provides more accurate detection results, and the detection ranges from 400ppm to 5000ppm4-color color-circle design, different font colors display different air quality, green 0-799ppm, light green 800-1199ppm, orange 1200-1599ppm, red 1600-1999ppm, 2000ppm above four colors flash at the same timeStrong anti-interference ability, low consumption and long service life