Ultra Silent-- Adapting Special Technology, This Lithium Fan Will Bring Instant Cool Feeling with Minimal Noise to Avoid Disturbing Your Working or Causing Any Trouble to You. Advanced Black Design-- With Sleek Inconspicuous Design, This Black Portable Fan Is Ideal for Cooling in Hot Weather or for Cooling for The Working Computer. Wide Application-- This Mini Fan Is Portable, Lightweight, but Powerful Enough to Push a Lot of Air Efficiently. It Is Perfect to Use for Travelling, Office, Kitchen, Outdoor Sports Such as Hiking, BBQ and More. Hand Held Fan-- Lithium Battery Operated Fan Is with Small Size. You Can Hold It in Your Hand or Put It in Pocket, Convenient for You to Take It Anywhere You Are Going. Could Be Repowered-- This Mini Fan Could Be Repowered by 5V Output Voltage.