portable usb fan led light program editable message cooling fan for notebook lapcomputer ing

features: 1. the metal hose of usb fan is flexible, the angle can be adjusted arbitrarily. 2. durable soft fan blades make you form injury. 3. power saving design: low power consumption. 4. user can edit the led message by software via connecting usb port to computer. 5. comes with cd driver, easy to use. specifications: input voltage: dc 5v output voltage: dc 5v input current: 0.5a output power: 2.1w metal hose length: approx. 20cm / 7.87inch