Otto V1-T12KB137, Throat microphone with acoustic tube & 80mm PTT. Microphone picks up even a whisper. Adjustable elastic strap for a comfortable fit. Additional ear insert options available. For TK480/481, TK290/390, TK280/380, TK2140/3140, TK190, TK2180/3180, TK5400, TK5210. List price $470.48
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