mini usb fan 1 speeds control 1. Altra silent,low noise 2. 5V Voltage,Power 2 ... Pure metal Fan for long using life Mini usb fan with 1 speeds control1.Convenient to use ,fit for computer or ... Car2.Good for gifts3.Good air cooling equipment4.With key switch5. Easy to installation,safe,Environmental protection6. 1 ... . AS blade, Full metal construction8.6.Can be pair with any adapter(optional)