The ActiPatch® Knee Pain product provides advanced long-lasting chronic pain relief using Electromagnetic Pulse Therapy and works great for arthritis, tendinitis, fibromyalgia, runner's or jumper's knee, strains, sprains and general knee pain. ActiPatch® is drug and ingredient-free so is safe for continuous use and can be used while taking any other medication. Unlike a TENS machine, you will not feel heat or vibration. In fact, ActiPatch® is completely sensation free, so the only thing you are going to feel is better. The ActiPatch® provides 720 hours of continuous pain relief with a unique on/off switch.