eBay
Beautiful design, great sound, it works greatly well in the table with hard surface, you can even feel the table is singing in that case.
 With blue light when working.
Compliant with CD, laptop computer, music phone, MP3, MP4, CD, handheld game consoles and other portable devices
Input DC voltage: 5v
Input DC maximum current: 500mA
Output maximum power: 2.5w

Without built-in battery, powered by computer or AC adaptor