I automotive mechanic and I spend all my telephone calls via a headset to avoid touching my phone with my headset Jabra pro mains.mon fell in oil and walk more quickly so I bought this model on the internet that parraissé good but after a week I crack !!!!! once connected a beep sounded in the ear we do not know why? communicating the sound alone and not decreased to go back in? the voice call is taken fantastic !!!!! so I will return .....