Small in size but big on performance, the rugged Coleman Aktiv Sounds CBT40 delivers up to 4 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 Black 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. Dual 5 watt drivers provide a robust, enhanced, and crystal clear listening experience. And its rugged, waterproof exterior makes it extra durable and ideal for both indoor and outdoor settings like pool/beach parties, camping trips, picnics, and even your home office!