Summary: My new volume level attainable makes me feel like I am using a brand new computer! Works with USB 2.0 AND 3.0 If you are using USB 2.0 and a squid dongel on a latop, it will not power the speakers. You would have to use the single USB 2.0 port to power the speakers only for it to work, in other words. Really impressed with the sound quality!
Summary: I bought these speakers without reading the complete description and I was totally surprised at all of the features these come with! They magnetically connect so you can use them as one big bar. You can also plug headphones right into them. There is a buzzing sound when nothing is playing on them but if you aren't listening to anything you can just turn them off. When I played music through them at max volume I didn't hear any buzzing.