This is a very cool device. I plug it into my IPOD, stick them both in my briefcase, don my blue-tooth wireless headphones ($50), then enjoy my tunes without being tethered by headphones cords! No more ripping the earphones out when I zip my coat or trying to find a pocket to stash the IPOD. It's also great for the gym to not be encumbered with cords. TIP- I found my wireless headphones, which are light & small, in the phone accessories section -- the ones in the music section were big & clunky and more expensive.The sound quality is at least as good as with in-ear buds & you can also synch it with your blue-tooth phone.