General Tools CDM77232 High Accuracy Temperature, Humidity and IAQ Monitor is an IAQ monitoring and ventilation control. This high accuracy temperature, humidity and IAQ monitor features NDIR (Non-Dispersive Infrared) Waveguide Technology with ABC (Automatic Background Calibration). Formerly Mannix Instrument.
Proposition 65 Warning for California Residents: This product can expose you to chemicals including Benzene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to 
