A **car USB fan** is a compact, portable cooling solution designed to enhance airflow within a vehicle’s cabin without relying solely on the built-in air conditioning system. These devices typically feature a flexible neck or a 360-degree swivel base, allowing passengers to direct a steady breeze exactly where it is needed most. Powered by a standard 5V USB port, they are highly energy-efficient and compatible with dash outlets, power banks, or laptop ports. They are particularly useful for cooling down rear-seat passengers, pets, or stagnant air in older vehicles, offering multiple speed settings to balance noise levels with airflow intensity.