[Accurate & Reliable] With this CO2 detector, you can test the CO2 concentration indoors precisely and quickly in order to protect your health. In addition to carbon dioxide measuring devices, the high-precision thermometers and hygrometers can also be used to monitor indoor temperature and humidity in real time.EPA Establishment N.O: 98615-CHN-1.[High-Precision CO2 Sensor] Use of non-dispersive infrared technology (NDIR), full temperature range correction, high measurement accuracy, fast response, resolution up to 1 ppm that can accurate detect air of Carbon Dioxide(CO2), measuring range up to 0 to 5000 ppm.[Newest Unique Mold & Design] The indoor air CO2 meter has two types of air quality warning, namely a three-color LED indicator light and a comfortable CO2 concentration in the facial expression, which makes the air quality more intuitive. Rechargeable lithium battery with a capacity of 2400 mAh, standby for 18 hours, supports USB charging and battery indicator.[Stylish Appearance] Exquisite appearance, simple design, light weight. It's easy to carry the intelligent air quality monitor that 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.Colour: blackMaterial: ABSPackage Contents:1 * co2 detectorOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.