... * Sensitivity: -25±3dB* Size: Length 36mm, Diameter 13mm* Color: normal black, normal white,for nano4G silver, nano4G black, nano4G purple, nano4G blue ... .W.: 4.5g* G.W.: 30.5g * Packing: blister D178 x W120 x H25 (mm)Compatible with* Compatible with for iPod nano 4G ... will be shown on the main menu of iPod.* When using it on for iPod touch 2G, iPhone 3GS, iPhone 3G, you need to ...