H20 Audio IN3-5A3 Waterproof Case for iPod nano 3G w/Arm Band Compatibility: iPod nano 3G Submersible up to 10 feet/3 meters (when paired with H2O Audio Waterproof Headphones) Commander scroll wheel allows function of the click wheel underwater or while wearing gloves LatchTight locking system SealTight connector (compatible with standard 3.5-mm headphone plugs)