Sounds a lot like the Bemer 3000 (Score 1)

The Bemer 3000 electromagnetic therapy has been around a while now and is used in a lot of therapies, particularly in sports where rapid healing from injury is needed. I've heard many good things about it and from the evidence I've seen it's not just some quack idea made into a product like many other things we're used to. Quite expensive for now, probably because of patents. Once they expire expect to see floods of cheap knock-offs come to the market.