This is speaker wire to 3.5mm 1/8 inch trrs stereo male plug jack connector adapter, bare wire pigtail replacement repair 3.5mm audio cable.Wiring diagram: PIN 1 - red wire; PIN 2 - white wire; PIN 3 - green wire; PIN 4 - black wire.OMTP standard: PIN1 - Left channel; PIN 2 - Right channel; PIN 3 - Microphone; PIN 4 - Ground.CTIA standard: PIN1 - Left channel; PIN 2 - Right channel; PIN 3 - Ground; PIN 4 - Microphone.The 1/8 3.5mm to speaker wire cable is widely used in microphone, speaker, headphone, headset, earphone, and more 3.5mm audio application.The 3.5mm cable comes with pre-stripped and pre-tinned ends, it's very easy to be soldered and connected.Package contents: 3 ft length 3.5mm stereo trrs male plug connector adapter to speaker bare wire pigtail replacement repair 3.5mm audio cable.