Features: This air quality Detectors can accurately measure HCHO TVOC PM0.3 PM10 HCHO TVOC, temperature, alarm clock and timers. Additionally, you can check the date/time and view data through the APPs. With this double ventilation structure, this indoor air quality monitors delivers accurate data of your air quality, large detection and small error. Use the apps to check current air quality readings, analyze trend over time and set alarms & timers. Get notifications and tip to improve your air. This air quality tester with a large and colorful screen, a display of 11 kind of data, and a quick understanding of environmental conditions through different color, making it to interpret air quality data. With a included battery, this air quality meter can work continuously. With high capacity battery, widely used around your home, office, school, hotel or car as need. Specifications: Material: ABS Screen: 2.8inch Battery: 2000mAh(Include) Measurement: TVOC: 0～9.99mg PM10: 0~999ug PM0.3: 0~999ug Formaldehyde: 0~1.99mg Temperature: -10°C～50°C Charging Port: Type C Size: About. 70x35x90mm/2.75x1.37x3.54in Color: 1/2 Package Includes: 1pc Air Quality Detectors note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.