Momoday&Acirc; Mini Portable Electric Personal Fans LED Lights Function Fans Wireless USB Rechargeable Desk Table Fan 3 Modes Speed Adjustable with 18650 Rechargeable Battery For Office Or Car use (Purple) 3 Mode Wind Speed Adjustable,speed 1 is the lowest wind,speed 2 is the medium,speed 3 is maximum Intelligent control system, reliable performance, multifunctional,easy for operation Using the brushless motor and improved PCB, ensured the super wind and long life High efficient and 2-8 Hours long working time (Depend on the mode you use). With LED Light function for emergency use Portable mini fan powered by lithium rechargeable battery, house,office or outdoor,wherever you are, it always offers cool wind