So, the intended use is not apropos to radio selection? Asking the purpose of the radio is entirely appropriate to this, as evidenced by the doc you link!
By the way, I am not aware that you are the arbiter of appropriate content on this forum. If you don't like it, just don't read it.
By the way, I am not aware that you are the arbiter of appropriate content on this forum. If you don't like it, just don't read it.