New MOTOTRBO earpiece from Motorola. Receive Only Surveillance Kit, Black (single wire) Intrinsically Safe (FM). Updated replacement part for the RLN5878.
Motorola often changes the product SKU name. This product may have also been known as PMLN6125a, PMLN6125b, PMLN6125c, PMLN6125d, PMLN6125e, PMLN6125f, PMLN6125ar.