Features: brand new and high quality This is a gas monitor that is able to accurately and in real for time monitor CO2 concentration, air quality, ambient humidity and temperature. NDIR Sensor: Provide high accuracy and fast measurement response. Multifunctional air quality detector as it effectively measures CO2, temperature and humidity. Carbon dioxide measurement range: 0-9999 Temperature measurement range: -20-60, humidity measurement range: 0-99%.. It's easy to carry. The intelligent air quality monitor can help us detect the gas air pollution in household, kitchen, bedroom, office, school, car, hotel, travel, camping, party etc...especially in which has baby,child and pregnant woman. Specifications: Material: ABS Size: 80mm/3.15in, 55mm/2.17 in Carbon dioxide measurement range: 0-9999 Temperature measurement range: -20-60 Humidity measurement range: 0-99% Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Carbon Dioxide Detector