Small in size but big on performance, the Coleman Aktiv Sounds CBT40 delivers up to 4 hours of your favorite tunes and has a built-in lithium-ion rechargeable battery so you can continue the party after a quick refresh! Features Bluetooth connectivity for easy music streaming from any compatible device, and it's rugged, waterproof exterior makes it extra durable and perfect for both indoor and outdoor settings like, pool/beach parties, camping trips, picnics, or even your home office!