Waterproof And Durable: Take the Cubitt Portable Speaker anywhere, to the beach or pool, without worrying about water. Complete waterproof function and durable fabric material protect from outdoor activities. Wireless Bluetooth: Stream sound wirelessly from any smartphone or tablet and maintain a strong connection. Features play/pause, call answer/hang up, call back, and next song functions. Up To 10 Hours Of Sound: Enjoy up to 10 hours of battery life with a built-in rechargeable 7.2V/2500 mAh battery. Quick charging takes only 3 hours via Usb port, cable included. 16 volume levels. Stereo Experience With 2+ Speakers: Connect more than 2 Cubitt Speakers for an impressive stereo sound experience. Enjoy 360 Hd Surround Sound with rich bass and a passive bass radiator. Built-in Microphone: Answer calls without disconnecting from the speaker.