Motorola 53866 Earbud with PTT Microphone for XTN Two-Way Radios, clip-on lapel mic and push-to-talk button - Formerly HMN9025, For noisy areas, Requires External VOX (Voice-Activated), Fits all Spirit M-Series and XTN Series Professional Two-Way Radios, Lightweight earbud, Clip-on push-to-talk microphone, Ear piece rests in the ear canal (MOT53866 MOT-53866 MOTO 53866 Earbud 53866)