Krypton KNF6132 USB Rechargeable Fan is unique and fashionable, using the German Brushless DC motor to ensure high winds and long life. Intelligent control system; reliable performance; which is a fully functional and easy operation. Standard USB interface; can mix and match digital devices; such as desktop computers; laptops; USB connectors; car chargers and so on; plug and play Battery Specification 18650Li-ion. The fan is operated by a USB of Rechargeable Battery and charges via An Android charger. Using the international standard 18650 capacity lithium batteries; that can be recycled.