Wall Mount/Desktop Large LED Screen IAQ Monitor Real-time CO2 Detector, Carbon Dioxide

Multifunctional: simultaneous, continuous and real-time readings of both CO2, temperature and humidity level. Monitor indoor air quality with only one instrument.
Accurate, fast and professional: adopts the non-dispersive infrared (NDIR) sensor, which is a sophisticated waveguide technology.
Wide measurement range: up to 9999pm for CO2 concentration, 99.9% for relative humidity and 60°C (140°F) for ambient temperature.
Easy to understand and intuitive: colorful large LED display with visual and audible alarms in case of high level of CO2 concentration. Audible alarm can be muted or disabled.
Programmable light bar indicator: alarm level adjustable from 800ppm to 3000ppm, if the original alarm level at 1000ppm by default is considered as inappropriate.