Small in size but big on performance, the Coleman Aktiv Sounds CBT25 delivers up to 6 hours of your favorite tunes and has a built-in Li-Ion rechargeable battery so you can continue the party after a quick refresh! Built-in TWS technology allows you to use this Red speaker independently or connect it to an additional speaker (sold separately) for a true surround sound experience. It also features Bluetooth connectivity for easy music streaming from any compatible device as well as a built-in microphone for use as a hands-free speakerphone. A 5 watt speaker driver and a passive sub provides a superbly deep, robust, and amazing listening experience. Plus, its rugged, water-resistant exterior makes it extra durable and ideal for both indoor and outdoor settings!