Be sure to ate the firmware before use. This is probably my fifth headset, lived the longest. the rest were either given to friends or lying around in a box. Sometimes the sensor is junk, in connection with this, it turned off the intelligent transfer of the call. Does not voice contacts indicated in Latin. Has pros: - sits comfortably on the ear - holds a charge all day with a high intensity of conversations - voice prompts (suggests to disconnect the phone connection, which reminded of a forgotten phone) - excellent audibility - voice response (helps a lot when both hands are busy) - excellent noise reduction Got cons: after 2 years of continuous use, at least 12 hours a day, the elastic band breaks at the kink.