DROK Bluetooth 4.0 Wireless Stereo Subwoofer Viewing Cradle Speakers with Universal Phone and Tablet Stand Compatible with iPhone iPad Samsung Built-in full-frequency dual voice coil unit and low-frequency radiator combines low frequency music play which allows more pleasant listing enjoyment It utilize high-quality ABS material, thus more reliable and endurable Double speakers creates outstanding voice; the uniquely designed base bring you relaxing and pleasant watching experience More than 2000mA battery volume that is 6-7 times of battery volume of common Bluetooth speakers; and its music play last for more than 12 hours New brand