Just waht the name implies a set of earphones with a built in (face mike) on a sort of boom in front. they are or were used by commercial telephone operators, traffic dispatchers, and similar commuhicaitns jobs where one wants hands-free convenience when monitoring traffic, for example. Does that answer your question?
One can expect to pay from $10 for a basic microphone headset to more than $200 for a high quality microphone headset. The average price for a microphone headset is around $50.
talk to the microphone on the headset
A boom microphone is a microphone on a boom which is normally on a headset. A swivel boom would be a headset microphone that can swivel.
headset with microphone
no it doesn't.
there wireless
headphones
Yes, it is dual channel Wireless Headset Microphone System.
About $20 for any basic headset.
The Shure wireless headset microphone is very comfortable, and covers the ears completely for an isolated listening environment.
The Audio Technica wireless headset microphone is powered by two AAA batteries which will last for about twenty hours of recording.
Sorry - not possible. The physical make-up of the microphone does NOT allow it to become a speaker.