iKKEGOL Mini Portable Wireless Rechargeable Super Strong Wind Desk Fan W/ Rechargeable Battery - 3 Mode Wind Speed Adjustable (Light Green) Portable mini fan powered by lithium rechargeable battery, house,office or outdoor,wherever you are, it always offers cool wind 3 Mode Wind Speed Adjustable,speed 1 is the lowest wind,speed 2 is the medium,speed 3 is maximum High efficient and 2-8 Hours long working time (Depend on the mode you use) Powered by Micro USB charging cable or 18650 rechargeable battery Dimensions: Approx :12.4X4.4X14.8CM /4.88"X1.73"X5.83"