Altec Lansing LifeJacket Bluetooth Speaker. Features include: waterproof, shockproof and snowproof construction; floatable and submersible exterior to listen to music in the water and a 50-foot range along with extra audio horsepower. This speaker holds an outstanding 30 hours of battery life and built-in smartphone charger to make sure your speaker can keep up with you while on the go. Built with with true wireless stereo plus pairing, pair up to 2 speakers simultaneously for a bigger and better sound! The LifeJacket 3 also features a built-in universal mounting bracket for easy attachment to equipment and structures like bikes, kayaks, jet skis, and motorcycles so the fun never stops!