With an easy-to-use slide-lock seal and additional Ziploc®-style closure, the E-Merse Dry Audio Case protects your phone or mp3 player from water and sand. A tough polyurethane body has two built-in windows for better visual access and photography. In addition, this durable case features a built-in audio cable so that you can listen to music without damaging your phone. The headphone cable is compatible with iPhone microphone controls. The E-Merse Dry Audio Case is submersible to 10 feet for maximum protection. A breakaway lanyard lets you wear the case comfortably and safely around your neck. Internal dimensions are 6.25" x 3.75"; External dimensions are 7.5" x 4"; Weight= 1.4 oz