This thing is a piece of junk. I was a little skeptical when I saw the price, but it was the only set of speakers for the Zen Vision:M that I could find. All it is is a speaker that plugs into the earphone jack of the Zen. The sound quality is absolutley horrible. If the speakers are turned up to an audible level they produce nothing but static. I tried playing with the volume on the Zen and on the speakers with no improvement. It isn't even worth the $13 I spent.