... Fan Provide cool wind in hot weather. USB interface, Plug and Play No external power supply. For PC/Notebook ... *Provide cool wind in hot weather. *For PC/Notebook with USB port.Ultra-quiet,Pitch angle,Safety net ... Do not use liquid or metal lubricant into the fan inside.5. Do not place or the vibrations ... sunlight, hot smoke, the room temperature use. 6.Fan to remove the power cord, hold pull the plug, ...