4 Pole 1/8" 3.5mm TRRS Female To 3 Pole TRS Male Jack Headset Microphone Adapter
3.5mm 4 Pole TRRS Female to 3 Pole TRS Male Microphone Adapter Cable Audio Stereo Mic Converter for Smartphone. Converts TRRS 4-pole 3.5mm male plug headset smartphone microphone to TRS 3-pole 3.5mm male jack plug.