This is a belt you wrap around your abdomen which has 2 large electrodes that stick to your abdominal muscles causing contractions of the muscles . Instead of doing sit ups to tighten your abs , u can sit on your sofa, and watch TV while the electrodes shock your muscles . This does not hurt . There are several numbers of intensity of the shock , u start out on a lower setting until your muscles get used to it , then turn intensity up as u feel comfortable. This isn't just another exercise fab , it really works great and u can feel the contractions taking place as u sit and watch TV. It's a 300.00 belt and worth every dime . U can order replacement electro pads which are very reasonably priced . There are 2 that is on belt now . Much better than sit ups , no back straining or sweating . Can even wear under your clothes while cleaning house or do whatever u choose . This is a deal u won't beat . I no longer need it is the only reason I'm selling it . If interested text or call 931-374-8367.