Features: Multifunctional: Can detect four substances, formaldehyde detection, chemical pollutants, carbon dioxide, air quality. LED Display: Full color large screen, easy to read. LED LCD color screen digital display and light mode are more clear read. Large Capacity Battery: The battery with 1000mAh has Long life, and its standby time is about 240-360 minutes. Easy and Intuitive Reading: Accurate to the thousands detection display and air monitoring level shown, which can read the data of air quality intuitively and easily. Wide Usage: With healthy and environmental material, it can be used for home, public places, cars, maternal and child room, etc.