Small in size but big on performance, the rugged Coleman Aktiv Sounds CBT30 Waterproof Speaker delivers up to 7 hours of your favorite tunes and has a built-in Li-Ion rechargeable battery so you can continue the party after a quick refresh! This Gray mini speaker features Bluetooth connectivity for easy music streaming from any compatible device as well as a built-in microphone and speaker so it can function as a speakerphone. A 5 watt speaker driver and a passive sub provide a superbly deep, robust, and amazing listening experience. Plus, its rugged, waterproof and dustproof exterior makes it extra durable and ideal for both indoor and outdoor settings. It even floats!