Limit Number Of Options From A Feature Per Product

I am trying to create a feature which options are more like a "radio" choice where the vendor can select only one option instead of a multicheck box. Is this possible?

I tried several combinations but Features offer only three options feature style "text/number", "checkbox" and "multiple checkbox" and in none of them seems to be possible create a list of option that the vendor can select just one.

Just for example:

I created a feature called Car Model. In this feature we have Model A, Model B and Model C. The vendor can select just one model per product, since there isnt a car that belong to two models different.

Nevermind, I didnt saw that the Text/Number feature style had a tab to insert options. I thought that it was a complete free style field.