There is an old Basschat thread here:
With a link to:
https://westoneguitars.net/basses/thunder/
(red bass further down). Has the same bridge but a single switch.
I guess being foot operated means no need to touch germ infested buttons. Also, obviously, you can keep playing your bass while pouring yourself a refreshing drink.
Seen in the second hand section. I think some kind of reverb, maybe an early prototype but I was not able to try it. Both pedals are connected to the water cooling tower in the middle - I assume it means it runs really hot.