This air quality tester accurately detects dust PM2.5 and volatile organic compounds (VOCs) in real time. It's super easy to read and clearly displays real-time data to help you understand your indoor air quality at a glance. This indoor air quality monitor uses a built-in battery and supports USB charging, which supports long-term continuous use and provides great charging convenience, allowing you to check the air quality anytime and anywhere. This air quality meter features a large, soft white LED screen that's super easy to read and clearly displays real-time data. You get a firsthand look at the overall environmental quality. In alert mode, the display alert you of the environment by changing colors and beeping alarms. This indoor air quality tester does it all with just one button. You can easily turn the display on or off and switch between modes. Built-in 3-color LED light and alarm conveniently indicate air quality level (from healthy to unhealthy). This indoor air quality meter is small and portable, and can detect the gas quality in bedrooms, living rooms, kitchens, offices, cars, schools, hotels, cellars, restaurants, campsites and other environments. Suitable for home air testing, car air testing, growth room, maternal and child room air testing, public place testing, etc. Colour:White Material:Plastic Package Contents: 1 * Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.