Logitech Stereo Speakers Z120, USB Powered (980-000524) for $7.99

Compact USB powered speakers: Simply plug them into your laptop or netbook for great sound no wall outlet required. 3.5 mm input: Connect your portable music player or any audio source that uses a standard 3.5 mm plug. Integrated cable management system: Your desk stays tidy with cords neatly stowed in the back of the speakers. Convenient controls: Power and volume are at your fingertips. Easy connections: Works with PC, Mac and iPod/MP3 players