CJB Dust Plug / Earphone Jack Accessory Purple Koala for iPhone 4 4s S4 5 All Device with 3.5mm Jack (US Seller) A perfect decoration & protection for your device! Fits for all devices with standard 3.5mm earphone jacks. Designed to protect your headphone jacks from dust, water & mist. Provides the final seal to the well enclosed phone/tablet design.