The Portable Waist Fan Clip On 10000mAh Rechargeable Personal Cooling Neck Shirt Fan is a versatile and efficient solution for staying cool on-the-go. With a sleek rectangular shape and a compact 3.5-inch diameter, this mini fan is perfect for indoor or outdoor use. Powered by a 10000mAh rechargeable battery with a 4-hour charging time, this fan provides up to 24 hours of working time. The clip-on, neck, and handheld mounting options make it convenient for use in various settings, while the anti-drop and anti-slip features ensure safety and stability. Ideal for keeping cool in any room, this fan is a must-have for those looking for a portable and powerful cooling solution.