This mini fan supports 3 kinds of wind speed adjustment, which can be easily adjusted with just one button. Built-in 800mAh battery that can be easily charged via socket/laptop/power bank or any other device with a USB port. With buckle,so can be easily hung on the backpack, and very suitable for commuting, travel, shopping, picnic, office, it will be one of the must-have summer bags one of the items.