Shortly after Apple released the iPhone, Shure became the first of several companies to completely address a problem plaguing fans of older headphones: they didn’t work. The Music Phone Adapter MPA-3c not only converted their differently-shaped headphone plugs for the iPhone’s special recessed jack, but also added a microphone and a button that handled the same phone call and music controls offered by Apple’s packed-in iPhone Stereo Headphones.

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