Any headphones or earbuds—with or without a microphone—can be used with Newer Technology’s Mic Extender Cable. An iPhone will utilize the cable’s microphone for calls regardless of whether a two- or three-ring tip is inserted into the female end.

I found nothing to warrant anything less than a top rating for the Mic Extender Cable. Various people I called reported that this cable’s microphone sounded better than the iPhone’s built-in mic. The toggle button to answer or disconnect calls is easy to find without looking, and the plastic clip for attaching the mic to a shirt hem is very well designed.