I have purchased several Bluetooth headsets and have only found one that works for me. I am a truck driver and work in very high noise environments. I am also on the phone non-stop, searching for loads. I stumbled upon an over the head, outside the ear boom style headset , sold by Interstate Connections. Quality sound for both you and your caller of choice. If you follow the directions for the initial charge, talk time is 15 hrs, stand by is 140hrs. Not much of a fashion statement, but sound quality and long battery life is my only concern. lithium ion battery is the key.