Summary: Needed speakers for our home PC - budget under $30 bucks. What i ended up with are these logitech speakers that look good, sound good, and surprised the heck out of me. They use an adapter plug (not usb) for power.
Summary: As with many products made in China---no directions were provided EXCEPT a clumsy set of drawings on the box flaps. I used the word clumsy, because the USER can easily be confounded by the way the drawings are presented.
Summary: I purchased these speakers to replace the previous ones I had on my computer. I needed speakers that were compatible with my computer as well as my tablet. I was pleased with my purchase. What I like about these speakers is that it has bass tone which can be adjusted according to taste.
Summary: I've been impressed with the sound of an older set of Logitechs that I have, and expected these to be at least as good. Although the sound could fill a relatively large room, they were bass-heavy, which made voices sound muddy.