... .CE/RoHS certifiedQuestions: 1:What is the raw material of your skull earphone ,the plastic or metal ?For this ... is plastic . 2:What kind of earpads silincone can you provide ?For the size ,we can provide three different size ,large size ,Middl size and ... and another Mobilphone ?Yes,of course ,the difference is jack ,different jack can decide to work with the player ,the following are different ...