A:
Connection radius all depends on what wireless router you have, location of the router in respect to location you are attempting to connect, room/house construction, and many other variables. No one could give a specific distance that would be accurate for your application.
We use this in a corner room on the second story. Our router is in a central location on the main floor. Our house has 2x6 wall construction and there is a total of three walls and the ceiling/floor between them. The connection for us is outstanding. For us this works much better than the built in wi-fi card in my son's computer (4 year old HP).