H251 / H251N / H261 / H261N / H351 / H351N / H361 / H361N / HW251 /HW251N / HW261 / HW261N / AH450 /. This item is unused and compatible with Plantronics H51, H51N, H61, H61N Supra Headsets & H251, H251N, H261, H261N, HW251, HW251N, HW261 & HW261N SupuaPlus Headsets.
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