Cobra Electronics CWA BT310 Waterproof Bluetooth Speaker Bluetooth Wireless Technology - Easily play music wirelessly from your smartphone, tablet or other Bluetooth enabled device Floating and Waterproof - It is fully submersible to 1 meter for up to 30 minutes and will also float when dropped in the water, so it's perfect for any occasion HD Hands-Free Speakerphone - Automatically quiets your music for hands-free calls with a built-in microphone Rugged Design - With a rubberized shell for shock and impact resistance, it's ready for anything you can throw at it Rechargeable Lithium-ion Battery - Keep the party going all day and night with 10 hours of music playback (also includes an aux input)