Excal 1000, Excal II, Sovereign GT, CZ-20, Tiger Shark, Tejon, GTI 1500, Surfmaster Pulse, CZ6a, DFX, AT PRO, Fisher 1235, Surf PI Pro, 1280-X, many more because I enjoy learning them. New Garrett Ca
In my opinion you are better off with either a Sand Shark by Tesoro or one of the others. Many have reported that the controls in the headset are prone to failure. I just thought it wasn't as fast a target response and lacked depth for a PI.