Some time ago I made it clear that I actually prefer a headset with a boom mounted microphone. The Etymotic ETY.COM is an example of such a device, as is the now defunct Plantronics .Audio 615m. It’s also true that the current trend in Bluetooth wireless headsets leans towards designs that are much less conspicuous.
Some months back I became aware of Zelher, a small company that offer a pair of what appeared to be very interesting Bluetooth headsets. I emailed the company inquiring about the products, specifically whether they supported HDVoice. Their response indicated that the company was going to offer a stereo headset for music use later in the year, but said nothing about support for wideband voice in the existing products.
I looked on Amazon to see that the Zelher P20 listed at $99, but was typically offered for around $60. At that price I wasn’t about to buy one just to satisfy my curiosity. A few weeks later I found the P20 offered by a daily deals web site for just $40. That was a bit more tempting.