3.5mm Stereo TRRS 4-Pole Plug to Mic Headset Jack iPhone A

3.5mm Stereo TRRS 4-Pole Plug to Mic & Headset Jack iPhone Audio Adapter - WhiteOverview: This 4-position 3.5mm to dual 3-position 3.5mm mic & headset splitter adapter features one 3.5mm male plug and two 3.5mm female jacks, allowing you to add a mono microphone input as well as a stereo output to your PC or Laptop, through a single 3.5mm audio port. While some of the newer laptops from Apple and Dell feature only a single (4-position) 3.5mm audio port that supports both audio input and output, this innovative headset splitter adapter breaks the audio port out into two distinct ports - one that can be used for a microphone connection, and the other for connecting external speakers