Hello, I am satisfied with the device overall, very good battery life, 1 month and a half if not too many conversations my interlocutors are realizing that it is a hands-free but without expressing a gene conversation. sometimes a small delay in response, or the presence of an echo, it must be based on the other phone, as far away from the hands free etc. too I had a problem with the firmware update that made me it unusable with my phone, it works on other models like it. voice commands are walking, some less. not embarrassing . I sent back the sav a new unit after a correct waiting period (about a big week)
