This type of fan features dual fan heads and a rechargeable battery that can be charged via a USB cable. It is designed to provide a stronger, wider airflow than single-headed handheld fans and is suitable for both indoor and outdoor use. Some versions may also be foldable and have a detachable base, allowing them to be used as a mini desk fan as well. The fans typically have adjustable speed settings and rotating heads to customize the airflow direction.