Drytunes Waterproof Wireless (Bluetooth) Speaker w/ Internal Dry Storage (Black) World's FIRST totally 100% WATERPROOF and DUST-PROOF, high-fidelity wireless speaker with safe and secure internal dry storage! (Rated IP-67) DESIGNED to be played CLOSED! Secure and dry interior storage for valuables. Fully customizable foam interior. More than 400 cubic inches of internal dry storage. Wireless Connectivity with compatible Apple iOS / Android / Windows devices, PC or Mac and most other Bluetooth-enabled devices. User replaceable and rechargeable battery with up to 16 hours of playback time. Exterior volume and playback control using included magnetic stylus (for use when playback device is inside case).