Speaker, Applicable for ipod, MP4 Player, Laptop, PC and More.With special particular patent in worldwide. Be applicable for MP3, MP4, ... magnet portable technique Built in magnet inside the speaker case, that will combine the 2 speakers ... 0.5V Suitable temperature: 0 - 40 C Be applicable for MP3, MP4, laptop, PC, MD, mobile phone, and ... will be the best choice for your journey speaker for ipod