Most annoying invention ever.
LOL
Bluetooth, imo, works sporadically, is a pain to setup, and your entire ear aches at the end of the day.
Plus, you look goofy.
I don't use mine, and have no idea where the earpiece is, good riddance.
What 9t is, is a very short range
radio broadcasting capability, allowing
for, among other things, data tranfers
between your phone, and a wireless headset,
or wireless speakers, or snchinfg data
wirelessly between your phone and your
PC, (depending on your phones capabilities).