Anti Dust Earphone Cool Skull Jack Plug Stopper For 3.5mm HTC iPhone 4S Easy to install and remove. Prevent dust from polluting the inside part of iPhone from earphone jack hole. Not only a anti-dust plug, it also decorate your iPhone and gives it a good look. Very small but useful and easy to use. It is not only used for iPhone 4/4S, Samsung Galaxy SII/SIII but also compatible with other cell phones with 3.5mm earphone jack.