Motorola Two-Wire Acoustic Tube Earpiece with Microphone and PTT (2 Pin)
Kenwood Discrete/Covert Earbud with In-Line Push To Talk
IP54 Rated (Rain & Dust Proof). Optional 2.5mm Earpiece Audio Jack.
Motorola Remote Speaker Microphone PMMN4021 to suit GP328, GP339, GP338 Waris Series