StarTech.com 4 Position Microphone and Headphone Splitter – 3.5 mm – 4 Pin / 4 Pole – Mic and Audio Combo Splitter Cable
StarTech.com MUYHSMFFADW 4-position to 2x 3-pin 3.5mm headset splitter for separate headphone/microphone plugs, white color. Easy-to-use and compatible with most devices. Connect multiple headsets simultaneously.