The Acti Patch Knee Pain Advanced Lon-Lasting Relief; provides advanced long-lasting chronic pain relief using Electromagnetic Pulse Therapy & works great for arthritis, tendinitis, fibromyalgia, runners or jumpers knee, strains, sprains & general knee pain. Acti Patch&174; is drug & ingredient-free so is safe for continuous product use & can be used while taking any other medication. Unlike a TENS machine, you will not feel heat or vibration. In fact, Acti Patch&174; is completely sensation free, so the only thing you are going to feel is better. Effective:; Clinically proven pain & inflammation relief at the source. Long Lasting:; 720 hours of action with On/ Off switch. Safe:; Drug & ingredient-free & is safe for continuous product use with no adverse effects. Safe for diabetics, arthritics, bedridden & the elderly & can be used with any medication. The pack contains: 1 Reusable Knee Wrap (Knee Wrap Dimensions: Length 26, Expands to 32, Width 7). 1 Acti Patch&174; 720 Hour Device.