Very good case as long as you take care of it, rinse it with fresh water for many uses

Very good case. I first tested it by putting a napkin inside and indeed not a drop of water got through.

I also tested it at a depth of 3-4 meters but not for a long time, e.g. 10-20 seconds.

The touch works on the phone screen but only if you take it out of the water or at most 10-20 centimeters inside. If you dive deeper, due to pressure, the touch does not work.
But you can take photos with the button it has.

Also, in videos, the sound was recorded just fine.

Good quality but very large. The operation is smooth and the photo button works. However, I haven't tested it underwater.

It is huge and uncomfortable. The front membrane does not fit well, resulting in the screen not being pressed correctly and it seems very easy to tear. You have to constantly put it on and take it off to charge, and finally, the one and only button needs a piece of paper to be pressed otherwise it doesn't work. I didn't try it in the sea because I'm afraid of the screen membrane. The rest of the case seems very waterproof though