Smart, powerful toning. The app-controlled abs belt discreetly tones & firms your abs, anytime, anywhere | Slendertone Unisex Abdominal Toning Belt | WowcherSmart, powerful toning. The app-controlled abs belt discreetly tones & firms your abs, anytime, anywhere | Slendertone Unisex Abdominal Toning Belt | Wowcher