ISound ISOUND-6705 Blue Duratunes Water Resistant and Drop Proof Bluetooth Wireless Speaker &ndash; IPX4 Rated with Amazing Sound from a Compact Size Durable, soft touch, rubberized textured finish - drop tested to 6 feet and comes with a heavy duty carabiner for convenience. Oversized 45mm full spectrum speaker delivers 3.5 Watts of crisp highs and incredible thumping bass On board music and volume controls with built-in hands free speakerphone and an echo free, crystal clear microphone for a complete wireless experience Rechargeable lithium-ion battery for up to 10 hours of uninterrupted music listening Connects wirelessly through Bluetooth or via 3.5mm Aux input for connection to almost any music device.