BARCELONA, MOBILE WORLD CONGRESS — Here at MWC in Barcelona, Krussell is showing off its latest lineup of waterproof smartphones cases called Sealabox, which let you take your smartphone swimming to snap pictures of the fishes. Available for almost all common smartphones, the Sealabox is IPX7 certified for water resistance up to one meter, and it’s been carefully designed to allow you to make the most of your smartphone in almost any environment.