As you may notice nowadays， some computers have only one TRRS audio in-out female jack Hence this audio splitter cable happens to help you out without needing to buy a new headset for your PC. This 4-position 3.5mm to dual 3-position 3.5mm headset splitter adapter features one 3.5mm male plug and two 3.5mm female connectors， allowing you to add a mono microphone input as well as a stereo output to your PC or Laptop， through a single 3.5mm audio port. While some of the newer laptops feature only a single (4-position) 3.5mm audio port that supports both audio input and output， this innovative headset splitter adapter breaks the audio port out into two distinct ports - one that can be used for a microphone connection， and the other for connecting external speakers. Features: Brand by Akiba-accessories Overcomes the limitation of some laptop audio ports， by turning a single 4-position 3.5mm audio port into two distinct 3-position 3.5mm audio ports， allowing you to connect a microphone as well as external speakers Allows the use of older audio accessories with newer computers Can be used with any portable device that uses a 4 position 3.5mm jack Connection A : 1x 3.5mm (4 Position-TRRS) Male Plug Connection B : 2x 3.5mm (3 Position-TRS) Female Jacks (1 for Mic， 1 for Headset) Approx Length: 15cm Color: Black Package Content : 1 x 3.5mm 4 Position to 2x 3 Position 3.5mm Headset Splitter Adapter (Note : Photo attached is for reference only， it may be slightly varied in items of colour， shape from the actual item delivered from time to time)