The Fda cleared Slendertone Abs Rechargeable Abdominal Toning System uses clinically proven Ems technology to tone and firm the abs in 6-8 weeks. Ems stimulates the nerves that control all of the major abdominal muscles causing them to contract and relax. The result of this repetitive action is tighter, firmer and more toned abs. Used worldwide by physical therapists and sports professionals to strengthen and tone the core abdominal muscles with a patented and clinically demonstrated system that works. Automatically advances you through programs 1-7. Rechargeable hand-held digital controller with Lcd audio and visual display. Intensity levels from 0-99. Belt fits waist sizes 24"-46". Includes: Abdominal Muscle Training Belt, Digital Controller, AC Charger, Travel Pouch, 3 adhesive Gel Pads, User Manual, Quick Start Guide and 2-Year Limited Warranty. Color: Black.