The Koss VC-20 volume control can be used with any music player. Its gold connector will connect to most headphone jacks. A convenient pocket or belt clip lets you position the VC-20 where it's most comfortable for you.
Provides convenient level adjustment from stereophone, includes pocket/belt clip for comfortable cord postitioning, connects to a standar d 1/8" jack.
1 Convenient, but...
It's definately a nice item to have... at first. I got mine so that I could use it with my computer, and be able to change the sound level without going through menus and unplug the headphones easily without having to crawl behing the computer, so that I could use them with my stereo. It worked great for about 3 months, however, it's wearing out - the headphone port has broken loose in the casing, and I have to fidget with it for a minute to get the plug all the way in (otherwise, sound only comes out one side). Due to the way it's constructed, the dial for the volume will keep it from getting any worse, so I'll still be able to use it, but it sure is annoying when I'm trying to move between things.
2 Nice, very useful
I use this on my computer. Yeah, there's software volume controls - but they require dropping out of whatever you're doing to set, and differ from program to program. It's far more convenient to be able to reach over and make a little adjustment without effecting what you're working on. Also, the sound quality isn't effected - I used to plug my headphones into a set of speakers to do the same thing, but it resulted in static and noise that degraded the music; this volume control retains the clarity of the music.
3 Very functional
This is a surprisingly useful gadget, as it serves as an extension cord and volume control. The extension cord aspect adds about 3 feet to your headphone, which gives me a lot more room to move when I am listening to music on my computer. The volume control is handy when using a portable player because you can change the volume without jostling the player.
4 Cool
It is nice to have a volume control off of the cd player so when its in its case i can change the volume.