M89B Air Quality Monitor Accurate Formaldehyde Tester HCHO TVOC PM2.5/PM10 Multifunctional Air Gas Detector Home OfficeOOTDTYoots: It is easy to carry the intelligent air quality monitor, which can help us detect the pollution of the gas air in the household, kitchen, bedroom, office, etc. Especially in which he has a child, a child and a pregnant woman. Indoor air quality monitor built into electrical sensors that can precisely detect air containing-malde-hyde(HCHO), vo-latile Or-ganic com-pound (TVOC), pm2.5 and PM10. Just press the power on/off button 3 seconds, you can easily operate this air monitor, designed with LED digital display, can provide the average value of each gas, real-time detection of harmful HC-HO and TV-OC. The air quality monitor comes with a USB charging cable and a built-in 1200mAh 3.7V rechargeable battery. The measured data can only be used as a reference to change the househod air environment. Comply with Test Scope Standard, CE Standard Compliance and ROHS Compliance Compliance. Specification: Material: PlasticSize: 11.8x7x3.4cm/ 4.65x2.76x1.34 inchProduct Model: HLW-100Display Mode: Color LCD Digital Display TVThe Floatin Error:3%-30%Product Specification: 120mm72mm34mmWorking Voltage: 5V Preheating Start: 120S (TVOC senson Formaldehyde Only)Battery Capacity: 1200mACcharging Time: About 4hStandby Time: About 240-360minPackage Included: 1 X Air Quality Tester1 X USB Cable1 X User ManualNote: Please allow 1-3cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.