Water resistant rmote speaker microphone. IP55 compliant and noise cancelling microphone enabling clear and consise audio transmission in noisy operating environments. This remote speaker microphone also has a 3.5 mm audio jack to plug additional earpieces. Applicable radios: TC-610P, TC-700P, TC-780, TC-780M, TC3000, TC3600 End of Production 2021/6/30 - no replacement - available as long as stocks last