Fujita iClam Extreme Sports Phone Cases

I’m pulling the trigger on this, primarily for the chest mount, which all by itself costs more then this whole kit
the reviews on Amazon ain’t great but I have a feeling with a little fiddling I can overcome the issues with the mount, the access to the controls I can get around with bluetooth.

Are the mounts compatible with GoPro?

In the immortal words of one of my good friends:

Keep clam
carry on!

How do you operate the camera under water?

Anybody know if you can still operate the touch screen with this case on?

Does it come with handlebar mounting for bicycle?

I want to know how much just the case weighs. Did some poking around and can’t find it mentioned anywhere.