I have put off me from the many negative reviews regarding. The sound and bought an original headset for my Siemens Gigaset. Buying I have no regrets. The sound quality of the earplug is fine and I'm obviously understand well via the micro. A self-test on my AB confirmed to me this impression. The headset also fits well. The only drawback is that it is somewhat fiddly to attach the ear. But this is typical of single-ear headsets. Therefore, I give the full number of stars.