Speaker, Applicable for ipod, MP4 Player, Laptop, PC and More.With special particular patent in worldwide. Be applicable for MP3, MP4, laptop ... new design of latent port Dimension: φ55 x 38.5/φ55 x 77mm Net weight: 112g Speaker: φ36mm ... +0.5V Suitable temperature: 0 - 40 C Be applicable for MP3, MP4, laptop, PC, MD, mobile phone, and ... volume It will be the best choice for your journey speaker for ipod