StarTech.com 3.5mm 4 Position to 2x 3 Position 3.5mm Headset Splitter Adapter M/F - White — audio, computers, electronics.

• 5mm 4-position (4pin) audio port that supports both audio input and output
• 5mm 3-position ports that provide a separate headphone and microphone connection that can be…
• Headset Connectivity Simply connect the headphone plug from your headset into the audio output…
• Plug the adapter into the audio port on your laptop and you're all set
• Just plug in your microphone into the audio input port marked with the microphone…