The product is specifically designed for exercise system to support body toning, Athletic enhancement and body building. It generates small, gentle and safe pulses that are delivered inside the belt placed on your skin. This is the same technology as used by many professional athletes and olympic gold medallists now you can engoy the benefits of this passive exercise in the comfort of your own home. It is easy to use with one CR2032bettery and LED display automatically. It has 10levels from light to strong for your choice desired exercise modes. It has 2models, one for man has 2control pannels(4positions) , and one for woman has 1control pannel(2positions) .