<P> Model number MA814LL / A. Bundled with the original iPhone and iPhone 3G, they feature a control capsule in - line with the right earbud's wire; they house a microphone and a single button, actuated by squeezing the unit, which (if supported by the device and its software) can activate features such as controlling calls, presentations, or music and video playback, launching Siri, or taking pictures with Camera application . </P> <P> There have been many reports of moisture problems with the remote / mic earbuds . </P> <P> Shipped with the iPhone 3GS, iPhone 4, iPhone 4S, the third - generation iPod touch, and independently . </P> <P> They expand on the iPhone Stereo Headset by adding two other buttons dedicated to volume control . </P>

Where is the microphone on the iphone headphones