content: I bought it for use with my Alias 2 phone. I needed the "L" jack because I wanted to put the phone in an arm band to listen to music while I worked out. I don't know if it is the phone or this jack (which is why I gave the 4 stars instead of 5) but if I have the jack plugged in all the way, I can only hear music out of one of my earbuds. I remedied this by wrapping a clear goody brand clear elastic around the jack so it doesn't go in all the way and I can hear out of both of the earbuds. The sound seems pretty good, and you can't beat the $3 for the adapter. Radio Shack wanted $10 for an adapter, and it wasn't even an "L" jack. I hope this helps!