What does "configurable" mean in an Aironet?

[cisco.noob]

I am considering buying an Aironet access point. I see that some models have the word "configurable" in the name, but I can't find any information about what it means. I would appreciate an enlightenment.

Thank you

[Bolik]

May be it will help you:
https://supportforums.cisco.com/t5/getting-started-with-wireless/configurable-vs-non-configurable/td-p/3047759
It's too sophisticated, I don't understand why cisco hide necessary information like this...