Not a bad description! *From what I've gathered, it does create a magnetic field which will vibrate the string indefinately, and therefore, create infinite sustain! *What I like, and I'm not TOO sure of this, is that you can turn this function off and on, so it will act like a normal pickup when turned off. *Like the Ebow, I'm guessing here that when its on, your volume needs to be turned WAY down. *But anymore info would be appreciated. *It seems to me there's a lot more controls that go with it, than when it only came on the Fernades guitars.