Newest improved design 2018 & Double insurance lock technology: the new double insurance lock technology could make sure no leak. The lightweight design makes wearing more comfortable. IPX8 certificated 100% water resistance:Case is extreme condition, so you can take your devices under water to take photos or video. it's perfect for fishing, swimming, rowing, snorkeling and other outdoor activities. Universal size and multiple uses of waterproof cases - Fits almost all popular Smartphone ( Apple i Phone 7, 6S, 6, 6 Plus, 5S, 5C, 5, 4S, Samsung Galaxy S7, S6, S6 Edge, S5, Note 5, 4, 3, HTC One M9, M8, LG G4 G3, Google LG Nexus 7, 6, Sony Xperia Z3, Z2, Nokia Lumia 1020, BlackBerry, Motorola G, GPS ) with maximum size limited to 6 inch. Leaves enough space to accommodate other valuable like credit cards, ID cards, passport, money etc. ( depends on size of your mobile cell phone )