None that I know of. Can only change the sound of the the locator from sonar, whistle, or referee whistle. Short of using a universal remote (if you don't mind the cat sitting on the Ultra) I think that's it. The universal remote wouldn't be recognized by the ultra's locate feature.
I guess you could also fashion a little raised cover over the locate button so it couldn't be pressed down also. Little piece of foam or plastic.
