Headphones have an arc behind your head with a microphone, which can be adjusted according to your needs. The microphone features noise cancellation for excellent speech recognition. Headphones are suitable for internet telephony and all VoIP applications. The headphone is also a volume control.
Headphone use every day at work. Min. 6 hrs. Per day. After a year and a half are kaput. From the preceding, I also had an ear inflammation, but the whole time I use this, nothing. Today I went to buy more. We'll see, I'll review whether the quality is the same or different.