Talk:TRRS Phono Plug
From Free Knowledge Base- The DUCK Project: information for everyone
sources
Headset headphone microphone for mobile devices can have 2.5mm or 3.5mm plug in TRRS.
3.5mm TRRS to 3.5 TRRS Adapter for Select Phones - 3.5mm to 3.5mm TRRS adapter that reverses the microphone and ground pins
iPhone Compatible Wiring - The iPhone style wiring is also compatible with the following devices (Partial list):
Phandroid - Accessory wired earbuds with mic
Notes on radio Headsets connection - There are basically eight types of wiring harness for the headsets available ,they are determined by the type of plug wiring required for the radio transceiver.