It may look like one speaker, but don’t be fooled: it has the sound capacity of two, and the clarity is rather sensational considering their size. The special vacuum bass extension plays bass tones deeper than you would ever expect just by looking at them. When you want to listen to music through your MP3 Player, CD Player, or Laptop, just plug the X-Mini II Audio Revolution Capsule Speaker into your audio jack and play. The long-life Li-Ion Battery recharges when you plug it into the USB port of your computer. The X-Mini II Audio Revolution Capsule Speaker is also networkable, allowing you to create a very rich stereo environment through USB inputs.