CJMCU-TRRS 3.5mm Audio MP3 Stereo Headphones Video Microphone Interface Module comes with the audio-style connectors that you see on phones. It is widely used in 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). This breakout board makes it easy to add a TRRS jack to your prototype or project by breaking out each conductor to a standard 0.1 spaced header. Features : Mini design, portable and easy to use. It is 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). Package Includes : 1 × CJMCU-TRRS 3.5mm Audio MP3 Stereo Headphones Video Microphone Interface Module 2 x (Straight) 6*1 Burg Pin- 2pcs SKU: PGI-0031293 Category: Break out Boards