The sandwich will cost $3.99 or $6.99 for a combo meal. If successful, KFC could quickly roll out the new chicken sandwich at all 4,000 of its U.S. locations.

A $25 "fan favorites" box also features four fried chicken pieces or six chicken tenders and four Liège-style waffles, along with 12 KFC nuggets, two fries and four choose-your-own dipping sauces ...

Unlike KFC restaurants, which sell everything from fried chicken pieces to nuggets to chicken sandwiches, the new venture focuses on crispy chicken tenders. The tenders come with the choice of 11 ...