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Features:Name: Audio breakout board1.TRRS connectors are the audio-style connectors that you see on some phones, MP3 players and development boards.2.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.3.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).4.Mini design, portable and easy to use5.Size: Approx 1.7*1.2cm / 0.6*0.5 inch6.Material: Plastic + metalPackage included:20 xAudio breakout with