Seadream 2Pack Headset Adapter for Headsets with Separate Headphone / Microphone Plugs - 3.5mm 4 position to 2x 3 position 3.5mm M/F-PC Headset to 3.5mm Smartphone Adapter (2pack black) Turns a 3.5mm combo headphone/microphone port into two distinct ports - one 3.5mm headphone jack and one 3.5mm microphone port Allows the use of older audio accessories with newer computers Compact design for maximum portability - a great solution to have on hand in your laptop bag Lightweight, yet sturdy design that can easily be plugged in when required This adapter is not a headphone splitter/Y-cable (Note: it is a splitter, not a combiner). It cannot be used to split the audio output to two separate sets of headphones or speakers.