Amazon.com: Kenwood KMC-45D Heavy Duty Speaker/Microphone, MIL-STD 810, Upgraded D Version Suitable for DMR/NEXEDGE/Analogue Portables with 2-Pin Connectors and ProTalk Series Radios, 2.5mm Socket for Earpiece : Electronics
Kenwood KMC-21 Remote Speaker Mic with PTT fits the TK-2400, TK-3230, TK-3400, NX-240 and NX340 series radios.
Mc-44 Handheld Speaker Microphone For Kenwood Mobile Car Radio Tm-261 Tm-271 Tm-461 Tm-471 - Walkie Talkie Parts & Accessories - AliExpress