The Altec IMW477DRTA Bluetooth Mini Life Jacket Speaker has an IP67-rated waterproof, sand-proof, shockproof and snow-proof construction; floatable and submersible providing a 30-foot range, 10 hours of battery life. Bluetooth wireless pairing with voice confirmation, Aux In port for non-Bluetooth devices, and built-in speakerphone functionality allowing for hands-free calls.