Air Quality Monitor Formaldehyde HCHO TVOC PM2.5 LCD Digital Detector

Features:● Compact mini and easy to carry.● Used to monitor air quality and protect family health.● Suitable to Home(Kitchen, Bedroom and etc.), Office, Car,ect.● LCD digital screen display, easy to read test results, more convenient for indoor air detection.● Adopting 12 bit AD smart chip with digital detection signal amplification, hardware and software arithmetic, more precise reading.Specifications:Color: Black WhiteWeight: 235gMaterial: ABSDisplay Mode: LEDUSB Cable Length: 51cmInput: 5.0V/500mAPower Supply: Rechargeable Lithium Battery 2200mAh(not included)Charging Method: USBCharging Time: 4hWorking Time: 5~6h(Fully charged)Operating Voltage: 2.5~3.2VTesting items: Formaldehyde, TVOC,PM2.5Test Principle: Principle Of Aemiconductor Gas SensorTest Range:HCHO: 0.000-2.888mg/m3TVOC: 0.000-9.999 mg/m3How to see the numerical value?1.When the concentration of formaldehyde is 0.1mg/m, it means that the concentration of formaldehyde in the surrounding air is within the safe range of the national standard, indicating good air quality.2.When the formaldehyde concentration is 0.1mg/mformaldehyde concentration0.3mg/m, or PM2.5115, it indicates that the ambient air concentration is excessively polluted. It is recommended to open the window immediately to maintain air circulation.3.When the formaldehyde concentration is 0.3mg/m3, or PM2.5250, it means that the ambient air concentration is seriously exceeding the standard. The buzzer sounds drop, drop and drop five times. It is recom