FIDOOVIVIA Waterproof Dirtproof Snowproof Shockproof Case Cover for iPhone4 4S Water prtoof up to 6.6ft (2 meters) underwater to IP-68 standards.Fully sealed from minute dust particles. CrystalClear anti-reflective optical glass lens for high quality. Sound Enhancement System improves audio quality. Desighed to Military and tested to withstand 6.6ft drops and shoks. UltraFlat screen protection ensures full screen functionality. All microphone and speaker vents are waterproof, featuring clearcoice clarity technology.