The cameras worn by the cops in my town are integrated with a base station in their patrol car. It activates when they are more than a few feet from the base st

The cameras worn by the cops in my town are integrated with a base station in their patrol car. It activates when they are more than a few feet from the base station (inside this range, they are presumably in range of the dash cam, at least for audio), and automatically uploads the recording when they return.