3.5mm Headphone Stereo Audio Mic Y Splitter,Dual 3.5 mm Plug (Audio + Microphone) to 4 Pole Comob Jack Aux Adapter for 4 pin 3.5mm Plug Smartphone Earphone - Newegg.com
Amazon.com: UGREEN Headphone Splitter 3.5mm 2 Female to 1 Male Mic and Audio Y Splitter TRRS Headset Adapter Cable Stereo Compatible with Laptop PS4 Xbox PC Phone Tablet Gaming : Electronics
USB-C to 3.5mm Headphone Jack Adapter for Stereo Audio
Insten 3.5mm Headphone Extension Cable, Male To Female, Trrs For Stereo Earphones With Microphone, 3 Feet, Black : Target
audio - Making a [4-Pole TRRS to 3.5mm Stereo & Mic Adapter (Male to 2x Female)] from an iphone headphone splitter jack? - Electrical Engineering Stack Exchange