The Advanced Foot Energizer and the Rhythm Touch (TM) Electrical Muscle Stimulator provide pain relief for deep muscle and tissue. Rhythm Touch has the longest history of use. Thousands of customers have found pain relief by using this particular acu-therapy machine, and at Pain Relief Essentials we have found most of our users prefer this brand. Our products are some of the few electronic muscle simulators cleared for non-prescription sale by the US Food and Drug Administration.