Features: brand new and high quality brand new and high quality 24 hours real-time monitoring to protect the healthy life of you and your family. Can accurate detect air containing Car-bon Dio-xide(CO2), For-malde-hyde(HCHO), Vo-latile Or-ganic Com-pound(TVOC). Those readings involve detection of tol-uene, harm-ful chem-ical sub-stances and po-llutants in the air such as car-bon dio-xide, car-bon mono-xide,s-moke,f-og,d-ust,in-k and others. Can provide the average value of each gas, real-time detection of harmful HC-HO and TV-OC in the room . It's easy to carry the intelligent air quality monitor that can help us detect the gas air pollution in household, kitchen, bedroom, office etc. Large screen display makes it easier to read data, and the buttons are easy to operate. Specifications: Material: Plastic Size: 120x63x26mm/ 4.72x2.48x1.02 in Battery capacity: 850m Ah( included) Power-on warm-up: 120 seconds Charging cable: 1.2m USB charging cable Working voltage: 5V Battery capacity: 850m Ah Charging time: about 3 hours Working time: about 180-240 minutes 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: 1 x Air Quality Detector 1 x Instruction Manual 1 x USB Charging Cable