Material : Plastic + PET Soft Film 1. Tough IP68 Waterproof / Dust Proof (Definition of IP68 waterproof here means it is underwater 2 metres .) 2. Have mute button design . 3. Back cover built-in metal sheet, you can use with the car magnet bracket . 4. Upgrade the phone jack seal design . 5. It can easily make you pry phone case . 6. Phone protective film of poor quality, or dusty surface of the phone , May affect the underwater touch screen effect . Warnning : Do not recommend more than 2 meters diving . Can use Swimming Snorkelling . In front is nano soft film, behind is a plastic hard cover . Support underwater watching movies, play music, photography . Please water test an empty case prior to inserting phone, ensure no leakage(general water test time for 10 minutes), install mobile phone again!