Having the ability to record what goes on in your cabin also allows you to have a record of your interactions in the event of traffic stops, and to keep track of what's happening in your car when it's in for service.
Many come with rearview and in-cabin cameras, making them very handy-if not essential-for ride-share drivers. Some offer a parking mode, which allows the camera to start recording if your car or truck is moved or jostled while parked. They can track your location using internal GPS and provide driver-assistance features like lane-departure warnings.
The latest dash cams come in a range of shapes and sizes, offering differing levels of capabilities.
