INVESCH Portable Lithium Battery Fan 4-inch Vanes 3 Speeds Rechargeable Desktop Fan (Black) Packaged, stylish,gift,portable multifunction rechargeable lithium treasure fan Brushless motor,big fan,air volume,long life.The motherboard uses a digital control chip,powerful,easy to operate. ABS material molded integrally Ghiha, looks simple and beautiful,sokid structure pressure,transport and use more assured The use of international labels 18650 large amount of lithium battery(2200mah) provides long life and strong power output. The removable battery design structure,user-friendly self-maintenance and replacement of batteries,enhance endurance.