I think you're talking about an muscle electrostimulator. The only one I have ever seen was a Globus unit and it cost $1100. that was a base model. I have heard of it doing some good for injuries. I have never seen or heard of it doing all they claim it to. But that said I have not run across many people who could shell out the cash to just try it. Keep in mind that medically we use electrostimulators for pain control in some nerve damage cases. Those units are very different from the commrecially available units and have a much different use....and they actually work as stated.