This product is a simple and reliable measuring instrument that combines ease of use and efficiency, allows you to disconnect 4 essential air quality factors: TVOC, HCHO, CO2, AQI. If you need it, come and try it, it won't disappoint you. Features: Powered by a rechargeable lithium battery, the air quality monitor makes it easy to take measurements from one room to another to get an overview of the air quality at home, workplace, school, day care center, or other place. An air quality monitor is also an essential tool to use when conducting property inspections or when using any household tool to see if there is any abnormal amount of toxin release. Intelligent detection of different types of gases. Most household gases can be detected, you don't have to worry about the applicability. The measurement is displayed on a clear screen, small and lightweight design, which ensures easy to carry. Natural airflow sensing technology has been adopted to more accurately identify air quality issues. Built-in polymer battery, energy saving and environmental protection, long standby time. Widely used in home, office, enterprise, government, school and automobile, etc. Detect and monitor air problems at any time to ensure the health of family members or employees. Specifications:Main Color: BlueMaterial: ABSConte Size: 2.8inDetect Error: lt; 15%Battery: 3.7V, 1000mAh (Included)Charging Standard: 5V, 1ACstandby Time: About 240-360minTemperature: 18-50CHightiness: 10-70%hrsMonitoring Varies: 20%-50%Product Size: 136*65*25mm/5.3*2.6*1.in, 0inPackage Size: 146*75*30mm/5.7*3.0*1.2inPackage Weight: 195g Package List:1*Air Quality Tester1*USB Cable1*User ManualMany questions about Dropshipping services are as follows:1. How many orders can you handle per day? We are a large company in Shenzhen, China, with a large warehouse that can handle large orders every day. We ship countless packages every day. We can guarantee the order you request.2. How fast can you process orders? We will arrange the shipment as soon as possible after you pay for your order. Priority delivery for dropshipping order3. Can you ship an order without any receipts, invoices and promotional offer inside the package? Absolutely! No invoices, receipts, promotional offer if you leave notes on the order (if you want, we can deliver.)4. If you need other products? We can supply most of the products you need as much as possible1If you have any other questions, please feel free to