I just purchased the NxZen Digital Wireless Headset model 5500 to go with my new HTC TYTN II PDA and I'm very disappointed! After reading many reviews and recommendations, I switched from as cheap ($55.00) Nokia bluetooth to this thinking it was an upgrade. What I found waa quite the opposite. The tonal quality on both sending and receiving (in a quiet environment) was very "TINNY" and just very cheap sounding. I can't even imagine trying to listen to music on it. It is junk, especially since I paid 3 times the price. I, honestly, feel I was ripped off.