It's powered by a 1200mah rechargeable battery that works wireless approx. 2 hours on a full charge. The battery can be charged by USB charger, laptop, computer, power bank or other USB-enabled devices. There are 3 different fan speeds that can be adjusted simply by pressing the power button repeatedly. Features a detachable base design to hold the fan on table. Each unit come with a USB cable and a wrist strip. 6 colors available for your option.