XTS 1500 Motorola NMN6193B: Original NMN6193B, Now Known As PMMN4051A: Standard Remote Speaker Microphone. (comes with slide on type clip #4205823V01, not screw mount type). When ordering the NMN6193B you will be shipped the PMMN4051A. Motorola has changed part numbers on the NMN6193B to the NMN6193C and now to the PMMN4051A. New Part# PMMN4051A This speaker Mic allows remote transmit and receive capabilities conveniently while radio remains in the case. This microphone includes: 6' Coiled Cord Assembly, 3.5mm Earphone jack. Swivel Clip, and quick disconnect latch, water resistant. When Mic attached to radio; radio main speaker disabled. However PTT is active on both Mic and on radio. Fits: PR1500, HT1000, JT1000, MT1500, MT2000, MTS2000, MTX8000, MTX9000, XTS1500, XTS2500, XTS3000, XTS3500, XTS5000, MTX838, MTX-LS NOTE: To avoid confusion, for ordering purposes, the suffix letter after the stock number is not listed. This part is also known as NMN6193A, NMN6193B, NMN6193C and now as PMMN4051A