... and the enjoyment of happy lives.1.earphones used for MP3,MP4,CD,Iphone,computer good design ... high plasticPVC material12.CE/RoHS certifiedQuestions: 1:What is the raw material of your skull earphone ,the ... .For shape ,different shape can be made 3:How is your earphone sound quality ?For our metal earphone ... another Mobilphone ?Yes,of course ,the difference is jack ,different jack can decide to work with ...