The Coleman Aktiv Sounds CBT50 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 Blue 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 speaker drivers (10 watts total) provide a robust, enhanced and crystal clear listening experience. 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!