No, I'm sorry. I ordered this online. It did not come with instructions. But all you do is plug it in where you would the headphones and it's ready for you to speak into it. It is very easy to use. You do not have to install it or download any applications.
No, I ordered this from an electronics store online. I can't remember the name of the store though. It was through amazon and the microphone was NIB when I got it so I know it was not used.