5V DC Cooling Fan Mini Portable Waist Hanging Fan Wireless Outdoor Fan A waist hanging fan is a type of portable fan that is designed to be worn around the waist. It typically consists of a small fan unit that is attached to a belt or strap, allowing the user to have a hands-free cooling experience. Waist hanging fans are often used in hot and humid environments or during physical activities to provide personal cooling. They are powered by rechargeable batteries and may have adjustable fan speeds and direction.And it is also a neck hanging fan.