Just to let all know, I tested these on the At Pro Gold, Infinium, and the SeaHunter II. And now I have a set on one of my Excalibur's. I think they are what several have been waiting for, A High Performance set of Underwater Phones and As always a first class Detector Pro / Extreme Detecting set of headphones. As far as I know they will not be offered for any other detector other then the Garrett Underwaters. I have found they work excellent on the Excalibur, and soon will be testing them on a CTX. So while the Skullies are in there testing stages and on hold till winter I will be setting these up for the Excalibur's as an easy install kit and once tested and I'm happy with them, for the CTX.