4-Pole TRRS Standards Adapter OMTP to CTIA Bi-Directional
Making a [4-Pole TRRS to 3.5mm Stereo & Mic Adapter (Male to 2x Female)] from an iphone headphone split… | Earphones wire, Electronic schematics, Headphone splitter
Final Soultion: Why Most HEADSETS WON'T WORK - Android Forums at AndroidCentral.com
TRRS pinout - Google Search | Apple headphone, Iphone headphones, Stereo headphones