Allows 2 sets of speakers to be connected to a PC. The 4-Pin 3.5mm to dual 3-pin 3.5mm Headset Splitter Adapter features one 3.5mm Male and two 3.5mm Female connectors, allowing you to add a microphone input as well as an audio 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-pin) 3.5mm audio port that supports both audio input and output. 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. Supports Windows and Mac. Top Quality Product. Type:Audio Splitter/Switcher Cable Length:6 inch