Plug the awesome LED Clock Fan into any USB (Universal Serial Bus) port to power the fan & the spinning blades will power cleverly aligned red & green LED's, displaying the time on an analog clock face with moving hour, minute & second hands. Soft fan blades blow a soft breeze to cool you as you work, & are also extremely flexible & safe for use, even to stray fingers. The flexible chrome cable means that you can position the fan wherever you would like, & even better, the clock won't lose time when you unplug it from your USB (Universal Serial Bus) port. LED Clock USB (Universal Serial Bus) Powered Fan Red & green LED’s create clock face Fan diameter approx. 8.8cm Measures approx. 40cm x 0.7cm Working voltage: DC 5 V Working current: 400m Ah