Mine was tested at 4bar and passed ...good enough for pool and ocean swimming.
If you're going to the Marianas Trench get it tested
If you're going to the Marianas Trench, you would not need to have to, as the pressure inside the submarine you should be riding at those depths would be normalized. Besides, the PAM382 is only rated to 300m, it's under by around 10,600m. :lmao: