The Beijing Air Quality widget shows the real-Time Air Quality Index(AQI), measured by the U.S. Embassy in Beijing , China.

- The overall AQI and PM2.5 measurements are updated every hour.
- PM10, NO2 and SO2 pollutants are also every hour (based on China MEP data).
- Widget is also available for Shanghai, Chengdu and Guangzhou.

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In order to install the widget, you need to insert it on the homescreen:

- If you are using Android 4.0 (Ice Cream sandwich), select the "All Apps" icon (usually on the top-right corner), then the widget tab, and click on the "Beijing Air" widget.
- If you are using any other version below 4.0, you need to long-press in an empty area on the default home screen and select "Widgets", and then "Beijing Air".

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For more information, you can consult the website www.aqicn.info.