Krypton KNF6039 Rechargeable Fan is unique and fashionable, using the German Brushless DC motor to ensure the high winds and long-life. Intelligent control system; reliable performance; which is fully functional and easy operation. Standard interface; can mix and match digital devices; such as: desktop computers; laptops;; car charger and so on; plug and play Battery Specification 18650Li-ion. The fan is operated by Rechargeable Battery which can be operated using the international standard 18650 capacity lithium batteries; that can be recycled.THE BRUSHLESS MOTOR AND IMPROVED PCB - Using The Brushless Motor and improved PCB, Ensured the super strong wind and long life - The structure of this fan is unique and fashionable. The brushless motor ensures high winds and long-life.INTELLIGENT CONTROL SYSTEM - Intelligent Control System, Reliable Performance, which is fully functional and operational POWER SUPPLY USING STANDARD BATTERY - Power supply can be standard 220-240AC supply or international standard battery- The international standard lithium batteries can be recycled.SIMPLE DESIGN AND STRUCTURE - A professional handy fan with simple design and firm structure - The structure of this fan is unique and fashionable. This is a professional portable fan with integration of design; simple appearance and solid structure.