Water bottle and speaker in one. Water bottle made of BPA-free Eastman Tritan™. With screw lid. The removeable bluetooth (version 4.2) speaker on the bottom is compatible with the most common smartphones and tablets. Range up to 10 meters. Ideal during your workout. Power 3W. Frequency: 20HZ-20KHz. With built-in 300mAh li-ion battery for hours of listening pleasure. Bottle contents 500 ml. Includes micro-USB charging cable and user manual. Each piece in a box.