MOTOROLA 53727 TALKABOUT® EARBUD WITH PTT MICROPHONE THE EAR BUD WITH PTT MICROPHONE LETS YOU TALK AND LISTEN WITHOUT HAVING TO REMOVE YOUR TWO-WAY RADIO FROM YOUR BELT. THE EAR BUD CONVENIENTLY FITS IN THE EAR AND DELIVERS GREAT SOUND EVEN IN NOISY PLACES. TINY PUSH-TO-TALK MICROPHONE CONVENIENTLY CLIPS TO COLLAR. WORKS WITH THE FOLLOWING TALKABOUT® SERIES RADIOS: T400, MU, MS, MT, MR, MH, MJ, MD AND MG.