Hi David,
The center is for a microphone mute. 73. Gary KB2YAA

-----Original Message----- 
From: David Pearson
Sent: Friday, July 17, 2015 9:04 AM
To: [log in to unmask]
Subject: possibly ot

Hello List:

I have a Logitech headset(possibly model #390), but not positive.  It's
plugged into an available USB port located on the front of the pc tower, and
seems to be functioning.

There is a plastic block along the headset wire(one side of which is
smooth).  On the other side of this block there seems to be a smooth button
surrounded by a plastic ring.  Pushing on this plastic ring seems to
raise/lower the headset volume level(depending on which side of
ring(top/bottom) is pushed, but I can't figure out what the smooth feelling
button in the center of this volume ring is for.  No documentation came with
this headset, and I'd appreaciate it if someone could "enlighten" me as to
its purpose.

Sincerely yours,



David S. Pearson-wa4dsp


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