Features: High-quality, 24-hour real-time monitoring to ensure a healthy life for you and your family. It can accurately detect carbon dioxide (CO2), formaldehyde (HCHO), and volatile organic compounds (TVOC) in the air. These readings involve detecting toluene, harmful chemicals and pollutants in the air such as carbon dioxide, carbon monoxide, s-moke, f-og, d-ust, in-k and more. It can provide the average value of each gas and detect indoor harmful HC-HO and TV-OC in real time. The convenient and portable smart air quality monitor can help us detect gas air pollution in homes, kitchens, bedrooms, offices and other places. Large screen display makes data reading more convenient and buttons are easy to operate. Packing list: 1 x Air quality detector 1 x Instruction manual 1 x USB charging cable Specifications: Material: plastic Size: 120x63x26mm/ 4.72x2.48x1.02 inches Battery capacity: 850m Ah (included) Power-on preheating: 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 1-3 cm error due to manual measurement. Please make sure you don't mind before bidding. Due to differences between monitors, images may not reflect the actual color of the item.