--------------------------------------------- Product description: --------------------------------------------- iPhone headset dust plug check card pin can effectively block the dust， keep the phone headset Kong Qingjie， extend the useful life of the phone lifetime warranty， effectively restrain the headphone jack wet oxidation side， and have at the same time take the card pin function that allows adjustment removed at any time and you're out mobile phone SIM cards， is an important prerequisite iPhone purchase small parts. --------------------------------------------- Product Features: Headphone jack dustproof * There are two kinds of black and white colors with transparent plugs for your match. * Can effectively block the dust， keep the phone headset Kong Qingjie， extend the useful life of the phone. * Have to take card pin function that allows you to adjust the phone at any time and remove the SIM card when they go out. * Prevent dust from dirt headphone jack， headphone jack effectively restrain the end damp oxidation. --------------------------------------------- ※ schematic pages for reference， this product does not include the host and software. ---------------------------------------------