Otto V4-10415, ClearTRAK, Over-the-Head. Heavy-duty headset with certified noise reduction rating(NRR) of 24dB. Built with an extreme noise-canceling microphone (3dB-Standard) (19dB-ClearTrak). PTT switch located on the earcup. Flexible, heavy-duty coil cord. For TK480/481, TK290/390, TK280/380, TK2140/3140, TK190, TK2180/3180, TK5400, TK5210. List price $370.93
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