Developed for use with both the iPhone and the iTunes-compatible Motorola RAZR V3i, Shure's new Music Phone Adapter MPA-3c ($40) enables you to use many pairs of standard earphones with iPhone, adding a specially tuned microphone and a call control button to your preferred earbuds. Shure claims that the microphone enhances "intelligibility regardless of background noise," providing "superior sound quality and ensuring that callers hear each other…
