Otto V4-NR2KB1, Ranger. Behind-the-head style with single left speaker. Speaker rotates on the steel frame to allow for adjustment. Water, wind and dust proof for harsh environments. Flexible, noise canceling left boom microphone with replaceable windscreen. For TK480/481, TK290/390, TK280/380, TK2140/3140, TK190, TK2180/3180, TK5400, TK5210. List price $388.48
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