... 1.USB fan for notebook,laptop,PC 2.Voltage:DC 5V 3.Power:2.5W 4.Speeds:one speed,low ... EMC approval USB plug Metal structure for durable use DC motor for quiet operation Body materialSteelBlade materialPlastic(PP)Voltage5VPower3WSpecification ... cord & Plugonly USB plug or USB plug with 5V AC~DC adapterCertificateEMCHeight13.6cmBlade diameter10cmNo. of vane4pcsBaseø4mm syphonFan guardline guard,outside ...