?Nowadays£¬ there is growing concern about the climate pollution all over the world. This air quality monitor can monitoring indoor PM2.5 concentration and help to take care of your family health. It can also measure the temperature and humidity simultaneously£¬ really useful. <br> <br> <strong>Features:</strong> <br> This air quality is based on the principle of laser scattering£¬ it can detect PM2.5 concentration of your house. <br> It can also measure the temperature and humidity simultaneously and temperature can be displayed in 2 units: ¡ãC or ¡ãF. <br> The backlight in 3 colors: green£¬ yellow£¬ red which respectively represent air quality level: good£¬ fair£¬ bad. <br> When PM2.5 concentration reaches bad level£¬ the meter will automatically give an alarm. <br> With a large capacity lithium battery£¬ the meter can work for a long time. <br> With a USB cable£¬ it can be connected with PC or power supply for charging. <br> With a removable base£¬ the meter can be placed on the table. <br> With a hanger£¬ it is convenient to hang on the wall. <br> Perfect for houses£¬ offices or cars. <br> <br> <strong>Specifications:</strong> <br> Color: White <br> PM2.5 Measuring Range: 0-999¦Ìg/m^3 <br> Resolution: 1¦Ìg/m^3 <br> PM2.5 Level: 0-75¦Ìg/m^3 Good; 75-150¦Ìg/m^3 Fair; &gt;150¦Ìg/m^3 Bad <br> Temperature Measuring Range: 0-45¡ãC / 0-113¡ãF <br> Humidity Measuring Range: 0-99%RH <br> Power Adapter: Input: AC100-240V Output: DC5V 1A <br> Battery: 3.7V Lithium Battery 1000mA <br> Item Size: 12.5 * 7 * 3.5cm / 4.9 * 2.8 * 1.4in <br> Item Weight: 178g / 6.3oz <br> Package Size: 25.5 * 21 * 5.5cm / 10 * 8.3 * 2.2in <br> Package Weight: 677g / 23.9oz <br> <br> <strong>Package List:</strong> <br> 1 * Air Quality Detector <br> 1 * USB Cable <br> 1 * Power Adapter <br> 1 * Lithium Battery <br> 2 * Accessories <br> 1 * Case