StarTech.com 3.5mm 4 Pin to 2x 3 Pin 3.5mm

The MUYHSFMM 4-Position 3.5mm to dual 3.5mm Headset Splitter Adapter features one 3.5mm Female and two 3.5mm Male connectors, enabling you to connect a 4-position headset with Audio and microphone input to your PC or Laptop.
This 3.5mm Headset Splitter Adapter connects into both the audio and mic ports on your desktop or laptop computer, providing a single (4-Position) female connector - a perfect solution for online gaming or use with VOIP applications (Skype, chat programs).
Featuring a compact, yet sturdy design, the headset splitter delivers the perfect solution for applications that require portability, and takes up very little space in your laptop bag.