Electro-chemical Sensor TechnologyThis air quality monitor built in Several electro-chemical sensors that can accurate detect Carbon Dioxide(CO2), Formaldehyde(HCHO), Volatile Organic Compound(TVOC), Particle Matter(PM2.5/PM10). Those readings involve detection of toluene, harmful chemical substances and pollutants in the air such as carbon dioxide, carbon monoxide,smoke,fog,dust,alcohol,glue,paint,ink and others. MaterialMade of ABS material, good feeling, non-toxic, eco-friendly and durable to use. Package Included: 1*Air quality tester, 1*USB cable, 1*User manual. LCD Colorful ScreenWith LCD Color Screen Digital Display and real-time display; it can mean value for each gas because long-term monitoring, and rate air quality level. CO2,HCHO,TVOC ,PM2.5/PM10 and mean value all displayed in one chart ,accurate and clear. Long Battery LifeBuilt-in 2000 mAn rechargeable battery and with one USB cable, the standby time can last for 8-12 hours after full charging while others can only use 3-6 hours after full charging. Portable and Easy to OperateMini-compact and easy to carry; Easy to operate with just pressing the functional button and all statistic display in chart. Multi-functional Air Quality DetectorThe intelligent air tester can monitor the variety of the environment in a period your care about,You can take it anywhere to monitor air quality. At the same time, you can set a standard value of formaldehyde. When harmful substances exceed the standard, The corresponding area will flash to remind. Wide ApplicationIt can be used for family,offices, hotels, schools, factories, conference rooms, laboratory, airports, hospitals, restaurants, and many other public places,meeting your various needs.it is not only a accurate monitor for air quality, but also nice decoration in your car or house. Specification: Sensor: DART electrochemical sensor Detection Technology: Air natural flow detection technology Temperature range: 5-45 Error Floating: 3%-15% Working Voltage: 5V/ 1A Standby time: about 8-12 hours Formaldehyde detector:range: 0 - 6.13mg/m3, resolution: 0.01ppm PM2.5 measurement: range: 0-999 ug/m³, resolution: 0.1 ug/m³ PM10 measurement: range: 0-999 ug/m³, resolution: 0.1 ug/m³ CO2 measurement: range: 0-5000 ppm, resolution: 1 ppm Package Included: 1x Air Quality Monitor 1x USB Cable 1x User Manual