This single-wire earpiece works flawlessly with 

For use with Icom:

F10 F11 F14 F14S F15 F20 F21 F21S F21BR F21GM F24 F24S F25, F33GS F33GT F34GS F34GT F33TR F43GS F43GT F44GS F44GT F43TR 

F1000S F1000T F1000D F1100D F2000S F2000T F2000D F2100D

F3001 F3002 F3003  F3011 F3021 F3022 F3023 F3031 F3101D F3102D F3210D F3230DS

F4001 F4002 F4003 F4011 F4021 F4022 F4023 F4031 F4042 F4101D F4102D F4210D F4230DS

IC-V8 IC-V80 V86, etc.

This earpiece comes with two-pin plug, with two screws (see attached picture). 

This earpiece/microphone enables you to talk and listen without having to remove the radio from your belt.