Videos comparing the iPhone built in microphone with this microphone
and the SP-AT831-IPHONE:
The microphone is very small - about the size of pencil eraser tip
(roughly 1/4" in diameter 1/2" long ). The cable is terminated in small 3.5mm
(1/8 inch) 4-pole male connector.
Using this microphone instead of the built in microphone on the phone will
result in greatly improved audio quality. Listen to the video above for