computer Speaker, Applicable for computer, MP4 Player, Laptop, ipod and More.With special particular patent in worldwide. Be applicable for MP3, MP4, laptop, PC, ... 5V +0.5V Suitable temperature: 0 - 40 C Be applicable for MP3, MP4, laptop, PC, MD, mobile phone, and more With ... it easy to use Built-in rechargeable lithium battery with high capacity, protected by multiple electro circuit, and the USB ...