What do I need to work Slendertone Abs3? You need your abs toning belt and controller, 3 x AAA batteries and one set of gel pads. Related articles I'm ready to start toning! How do I control my Slendertone Abs3? What toning programs does Slendertone Abs3 feature? How Slendertone Abs3 Toning Belt Works I can't feel the middle gel pad Slendertone Abs3 Toning Belt Unboxing & Set Up Video Comments 0 comments Please sign in to leave a comment.