HKM-159379 Indoor CO2 Meter with Temperature and Humidity Sensor, 3-in-1 Air Quality MonitorIntroducing the HKM 159379 Indoor CO2 Meter, a sophisticated 3 in 1 air quality monitor that plays a crucial role in maintaining a healthy indoor environment. This device seamlessly tracks CO2 levels, temperature, and humidity, making it an indispensable tool for anyone looking to improve their living or working space. With its measuring range of 400 5000 PPM, the HKM 159379 delivers accurate readings thanks to its precise accuracy of (50 ppm + 2. 5%