from web site
The vital flex core AB Stimulator is a fitness device designed to help tone and strengthen your abdominal muscles by using Electrical Muscle Stimulation (EMS) technology. This wearable gadget targets your core muscles, sending gentle electrical impulses that mimic the signals your brain sends to your muscles during exercise. The idea is to stimulate muscle contractions, helping you achieve a more toned and sculpted appearance while saving time and effort.