Motorola PMMN4045 Speaker Mic Motorola speaker microphone, model number PMMN4045. This is an Intrinsically Safe (FM Approved) speaker mic. Radio models compatible with this mic: GP900, GP9000, HT1000, JT1000, MT2000, MTS2000, MTX8000, MTX838, MTX900, MTX9000, MTX960, MTX LS, XTS1500, XTS2500, XTS3000, and XTS5000 EF Johnson models compatible with this mic: 5100 SERIES, 511X, 512X, 514X, 518X, 51SL ES and Ascend ES.
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