One truth about working with audio is you always need the cable or adapter you don't have in your toolbox. That's why we love these terminal-block audio connectors so much. No soldering required! Use stranded or solid core wire and a small screw driver to create custom wiring jigs. This is the 3.5mm (1/8") 4-Pole (TRRS) Audio Plug Terminal Block. TRRS stands for Tip, Ring, Ring, Sleeve. It has four total conductors - three signal and a ground as opposed to a more common stereo jack's two. This connector is most often used in smartphones & cellphones to provide stereo audio and one mic channel. On a Raspberry Pi the extra connector is used for composite video. Note that the green block labels it as GND-blank-Right-Left which is the most commonly used order. However, it would be more technically correct to just label it Sleeve-Ring-Ring-Tip: goes in the same order as the four contacts on the plug. We also have a (matching) 4-Pole Audio Jack Terminal Block! Technical details Note: As of Wednesday, April 20th 2016, this product is now gold-plated instead of nickel-plated. * Length (end to end): 40mm / 1.57" * Weight: 6.5g * Wire gauge: 30-16AWG * Terminal pitch: 3.5mm https://elecena.pl/product/22712862/3-5mm-1-8-4-pole-trrs-audio-plug-terminal-block 2023-03-06 https://elecena.pl/product/22712862/3-5mm-1-8-4-pole-trrs-audio-plug-terminal-block 2023-12-27 https://elecena.pl/product/22712862/3-5mm-1-8-4-pole-trrs-audio-plug-terminal-block 2024-09-19 https://elecena.pl/product/22712862/3-5mm-1-8-4-pole-trrs-audio-plug-terminal-block 2024-11-29 https://elecena.pl/product/22712862/3-5mm-1-8-4-pole-trrs-audio-plug-terminal-block 2024-11-30 https://elecena.pl/product/22712862/3-5mm-1-8-4-pole-trrs-audio-plug-terminal-block 2025-11-28 https://elecena.pl/product/22712862/3-5mm-1-8-4-pole-trrs-audio-plug-terminal-block 2025-11-29