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3.5mm Audio Socket Stereo Sound Module w/ Mic for MP3 Player - Red
Description: The audio-style connectors that you see on some phones£¬ MP3 players and development boards. TRRS stands for "Tip£¬ Ring£¬ Ring£¬ Sleeve£¬" which reflects the fact that£¬ unlike a standard stereo connector£¬ this actually has three conductors and a ground. Some devices use the extra conductor for a microphone (like hands-free headsets) or to carry a video signal (like in some MP3/MP4 players).