Colorful MUSIC ANGEL Mini Speaker For Micro SD/TF USB MP3 MP4 Ipod (Green) Dimension: 50 x 50 x 49(L*W*H Weight: 150g Color: Black,Green,Rosy,Silver(as pictures shown) Speaker:1.77 inch(diameter 45mm)magnetically shielded, 4 ohm Save/Download:USB data cable download, no external card reader