Most new laptops and Ultrabooks come equipped with a single 3.5mm 4-position (4pin) audio port that supports both audio input and output. However, A great number of headsets on the market come equipped with two separate headphone and microphone connectors that are not compatible with this new configuration. Here is the solution with 3.5mm stereo audio cable that splits a single headphone jack into two, which allows the use of older audio accessories with newer computers. https://www.zapals.com/3-5mm-stereo-headphone-mic-audio-cable-male-to-2-female-y-splitter-cable.html