USB Fan, 3 Speed Rechargeable Table Fan, Portable and Compact Mini Personal Hand-held Fan for Home and Travel, 18650 Battery and USB Cord Included (Purple) Rechargeable & Longer Working Time: Built-in 18650 international standard rechargeable lithium battery with extra large capacity support up to 10 hours working time on a charge. Quite & Energy-Saving: Equipped with pure copper and brush-less motor, which is featured with quite operation and efficient energy saving. Portable & Compatible : Come with a USB cable, widely compatible for most power source. 3-Speed Options: Three modes of wind speed. (Breeze, natural wind, and powerful wind.) Fashionable & Easy-carry: Three colors to choose; light weight with only 7.6 oz, stylish and compact body make it easy to use whenever and wherever.