Noise Cancelling Remote Speaker Microphone with 3.5mm earjack at head of microphone with Coiled Cord & Swivel Clothing Clip - Intrinsically Safe (FM)
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Motorola often changes the product SKU name. This product may have also been known as PMNN4045a, PMNN4045b, PMNN4045c, PMNN4045d, PMNN4045e, PMNN4045f, PMNN4045ar.