I wont bother with the technical specification of this headset as I will probably get it wrong and can easily be found on a different page. Throughout my working life it has revolved around headsets one way and another and I think I have a pretty good understanding of them. I have to say to date this is the best headset I have used. My only disadvantage is that it seemed more complicated to set up than it should have been (this may be down to human error!!). Once the headset was set up, it is easy as pie to use and the clarity of the speaker is better than the normal handset on my land line. Also from feedback from the people I speak to ...  Read the complete review