Portable Stereo Bluetooth speaker with Voice Confirmation. 2 x 1.5" Neodymium Drivers and single passive radiator for enhanced rich bass. On board microphone for clear hands-free communications. APT-X technology for CD quality audio. 3.5mm Aux in connector for added device compatibility. Built-in rechargeable Li-ion battery (8 hours battery life). Rugged interchangeable rubberized jackets. Metal grill for maximum driver protection.