Product features 1: 2.0 independent cavity stereo Bluetooth Soundbox. 2: The only Bluetooth Stereo with function as base support . 3:The only Bluetooth Soundbox with USB charging function . 4: The only Bluetooth stereo with 2000MA aluminum battery. 5: The Bluetooth Soundbox that specifically designed for tablets and smartphones. 6: The only Bluetooth Soundbox that make tablet PCs, digital photo frames and smartphones become mini-computers. http://www.sh-seekers.com/