This is a good question worthy of continuing an aging topic.
I dive dry in California. I have wrapped the FOB for a Kia Niro in aluminum foil and hidden in the car. I dove with the physical key hung around my neck. Fine, that works. I dump my gear and unzip and pop the neck off the drysuit to get at the physical key. Seems archaic.
However, I also have recently been diving with the entire fob hung around my neck in an inadequate but thick plastic zip thingy. As such, I experience the wonderful joy of walking up to the car after a dive and having it unlock as I approach the tailgate door, sitting down and releasing gear. No fussing, but there is a small risk of water intrusion.
Dryfob is a faraday cage, so it will not scratch the itch. I am looking for a more robust plastic thing. I am willing to take the risk for drysuit diving which is mostly dry.
Dryfob does seems to be a decent solution for wetsuit diving On Oahu a decade ago. I tried shore diving with a primative keyfob from a rental car. I wrapped it in two ziplock bags and when I surfaced the fob was wet. Not soaked, but wet. I toweled the fob, pulled the battery out and set the fob to dry on the hood for an hour. The thing worked miraculously. Today I would use a dryfob.
Cheers,
Stan
