Car vacuum cleaners are portable, compact devices designed to clean the interior of vehicles. They are equipped with powerful suction to remove dirt, debris, and crumbs from carpets, upholstery, and hard-to-reach areas like vents and under seats. Many models are lightweight, cordless, and come with various attachments, such as crevice tools and brush heads, for effective cleaning. Some car vacuums are also designed to handle wet and dry messes.