Carbon Dioxide (CO2) RH & Temperature Real-Time Air Quality Monitor

HIGH-PRECISION SENSIRION CO2 SENSOR – Equipped with Swiss-made Photoacoustic Sensor provides precise and reliable readings, which gives you peace of mind about the air in your home. CO2 detection range：400～5000PPM,accuracy：+/- 5% + 50PPM. Temperature range: 14.2°F ~ 122°F, Humidity range: 20% to 95 %. CO2 monitor for Home, RV, Grow Tents. INDOOR AIR QUALITY MONITOR - Detect rise and decrease in carbon dioxide level, perfect for anyone wanting to monitor air quality! Elevated CO2 can cause symptoms like headaches, drowsiness, allergies and difficulty concentrating, to keep an eye on air quality at home or work! Either set it on tabletops, or mount it on the wall. 3 x AAA Battery(not included) for Backup & outdoor manual calibration.