Tips: ---The waterproof case was designed only for iPad pro 11 inch; ---When put your waterproof ipad pro 11 2020 into the case, you`d feel the volume is a little bit quieter than without it, that`s normal due to the full sealed design; --- Please do Water Test according to the User Manual before taking the waterproof 11 inch ipad pro protection case to swimming pool, beach or anywhere has water. And Ensure all the seams are closed;