![header-lesson-05](assets/header-lesson-05.png)

# Loading the Extension

You must first import the blocks necessary to operate the Kitronik Air Quality and Environmental Board.

Click on `Extensions` in the Toolbox.

![makecode-kitronik-aqb-loading-extension-00](assets/makecode-kitronik-aqb-loading-extension-00.png)

A new window will open. Type "air quality" in the search box. Two versions of the extension will be returned in the search. Select the second with 'v2' in the name.

![makecode-kitronik-aqb-loading-extension-01](assets/makecode-kitronik-aqb-loading-extension-01.png)

After you select the extension, the blocks are now available in MakeCode.

![makecode-kitronik-aqb-loading-extension-02](assets/makecode-kitronik-aqb-loading-extension-02.png)

MakeCode starter code with the extension extension preloaded can be opened [here](https://makecode.microbit.org/S54121-21065-98697-32959) (right-click and open in a new tab or window).