Grey Ghost Waterproof Headphones for AT Pro, Anyone have em?

[Ace350]

I am considering buying the Grey Ghost waterproof headphones for my new AT Pro instead of the Garrett waterproof headphones.

I have a few questions that maybe some members can answer that have the Grey Ghosts or even better if they have tried both.

1.) Do they have the same plug to plug them in to the waterproof AT headphone jack?
Or is there an adapter or do you have to do modifications or send it in for mods?

2.) What do they mean by "Underwater-pluggable bulkhead connector is standard". (Anybody have a picture of it?)

1.) Are they any better than the garrett waterproof headphones? If so why?