Its pretty much exactly like an ebow, but way more effective since you dont have to hold onto it. People here talk about it all the time because its in some models of the Synyster Custom guitar. Here’s a video with Pete Thorn kinda demonstrating it, which on that note, if you dont know about Pete Thorn CHECK HIM OUT!. Hes such a monster guitar player. I saw him play after guthrie govan in LA and he joked that he wouldnt be able to hang with guthrie, and that couldnt have been further from the truth.