Features: Real-time monitoring of CO2 concentration. High-quality and high-precision NDIR sensor. With 3 different color to show concentration of CO2, normal, alarm & dangerous. clear display, easy operation and stylish appearance. This indoor air Quality Monitor can detect the air of Carbon Dioxide(CO2), humidity, temperature accurately to let you know the environment clearly. It's easy to carry the intelligent co2 monitor that can help us detect the air quality in the household, kitchen, bedroom, office, school, car, hotel, travel, camping, party etc...especially in which has baby, child and pregnant. Specifications: Material: ABS Size: 98x90x42mm/3.85x3.54x1.65 in Temperature: - 10 ℃ and 40 ℃ Humidity: 0-99% RH Carbon dioxide: 0-5000 PPM Package Includes: 1x Carbon Dioxide Detector 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.