A stimulator device for providing stimulation to the gastrointestinal tract of a user including a housing, at least two electrodes, and a pulse generator. The housing has an exterior surface and an interior surface defining a sealed interior space. The housing is constructed of bio-compatible materials and sized and shaped for transport through the gastrointestinal tract. A portion of the at least two electrodes is disposed on the exterior surface of the housing. The pulse generator is disposed in the interior space of the housing and delivers pulses to the electrodes. Also presented are methods of using a stimulator device in the treatment of: gastrointestinal disorders such as dysphagia, gastroesophageal reflux diseases, functional dyspepsia, gastroparesis, postoperative ileus, irritable bowel syndrome, constipation, diarrhea, fecal incontinence, nausea and vomiting; gastrointestinal obstruction or pseudo-obstruction; pain and/or discomfort related to visceral organs; eating disorders, such as obesity, binge eating, bulimia, anorexia, and chemotherapy-induced emesis or emesis of other origin.