Connects your portable devices to your headphones with microphone. Provides stereo audio and voice over one single cable This 4-conductor 3.5mm TRRS (Tip, Ring, Ring, Sleeve) cable provides an extra conductor over the stereo TRS plug, allowing you to carry both stereo audio and voice over one single cable. Compatible with PC/laptop, speakers, headsets, smartphones, tablets, mp3 players, and microphones with a 3.5mm connec 4-conductor 3.5mm TRRS (Tip, Ring, Ring, Sleeve) cable. 3ft length Enjoy stereo audio and voice from your portable devices on your headphones with microphone. Convenient and easy to use