* Handhold Rechargeable Mini USB Ventilator Desk/Portable Fan of Battery Operated and Rechargeable Portable Powered Ventilateur Fans Outdoor Used.The structure of fans in unique and fashiionable Intelligent control system,reliable performance,which is fully functional and easy operation Using the international standard 18650 capacity lithium batteries,that can be recycled and low cost,more universal Yellow button:Battery activation button. Green button Click shift button after activate battery,the fan will cyclic shift,press once to change a speed. The program is"power on-1 speed-2 speed-3 speed-power off Red button Quick shutdown button. This red button is also replacing the fans which are without yellow one.Working mode indicator* In a car it is very difficult for a back seater to have a cool breeze of ac they suffer from sophistication this mini portable fan solve this issue in a sec.