How to make a filter using checkboxes in Angular?

Question

Angular

There is json with objects, each object has a category parameter. The html page has checkboxes with these categories.
How to filter the output to only show objects that have one of the checked categories. With broadcast?
It only comes out like this:

<select ng-model="cat">
<option>...</option>
...
</select>

<div ng-repeat="product in products | filter:{category:cat}">
...
</div>

It turns out a sample of only one category without the possibility of multiple selection.