Additionally, cable-ready TV sets can display HD content without using an external box. They have a QAM tuner built-in and/or a card slot for inserting a CableCARD.
What features allow the cable-ready TVs to display HD content without an external box?
{'text': 'a QAM tuner built-in and/or a card slot for inserting a CableCARD', 'answer_start': 98}