Logitech's X-140 stereo 2.0 speakers feature dynamic, real-time bass equalization to maximize low frequency response while minimizing distortion. Innovative Two Driver Design allows you to experience deeper bass while maintaining a slim profile. The auxiliary input allows you to connect an additional portable MP3 or CD player. And the stereo headphone jack means you can enjoy your music privately whenever you want. Integrated Controls allow you to access power, tone and volume on the speakers.