Features: 9 in 1 MULTIFUNCTIONAL AIR QUALITY MONITOR: Upgraded indoor air quality monitor that can accurately assesses multiple measures of air quality including concentrations of formaldehyde (HCHO), PM2.5, PM1.0, PM10, HCHO, TVOC, temperature, humidity, AQI, Date/Time. Its very necessary for you to know the air quality of your living place PORTABLE AIR DETECTOR: Spot check indoor air quality anywhere or leave device on for continuous monitoring , This easy-to-carry air quality detector can help monitor air quality at home, kitchen, bedroom, office, school, car, hotel, travel, campingetc...especially in which has baby,child and pregnant woman. EASY OPEARATION: This air monitor is easy to operate with just pressing the functional button, Updated user manual is very simple and easy to understand. The 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. If the density is higher than standard value, the device will alarm. PORTABLE & USB RECHARGEABLE BATTERY: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. Built with 1000 mAn rechargeable battery and packaged with one USB cable, the standby time can last for 8-12 hours Specifications: Continuous work time:300min Battery:1000mAh polymer lithium battery Input voltage:5.0V/1000mA Charging temp:-10-45 FormaldehydeTest object range:0-1.999mg/m3 Test tech:semiconductor sensor Sample type:ciffusion type Concentration unit:mg/m3 TVOC Test object:TVOC Test range:0.000-9.999mg/m3 Test tech:semiconductor sensor Sample type:ciffusion type Concentration unit:mg/m3 Test time:5 min PM2.5/PM1.0/PM10 test Test principle:laser light scattering Test particle population:2.5um,1.0um,10um Test particle mass:PM2.5,PM10 Sample time:3 sec Test method:concentration(per liter) Test range:0-999ug/m3 Use environment Air pressure:86Kpa-106Kpa Relative humidity:20%-85% Test temp:-10-45 Storage temp:-20-50 Condition:100% Brand new and high quality Manufacture:China,Chinese Factory Homegrown products for Sale Friendly Tips: Please allow minor error of measurement,due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding Package Included 1x Air Quality Monitor Tester 1x USB Cable 1x User Manual