The Yaesu MD-100A8X desk mic...This mic works well with the FT-450, FT-450D, FT-840, FT-847, FT-857/D, FT-890, FT-897/D, FT-950, FT-990, FT-1000, FT-1000MPV and FT2000. It does not work on some older Yaesu transceivers such as the FT-757GXII and FT-736R.
Please also note that Yaesu desk mics such as the MD-100A8X will not work on Yaesu mobile radios due to differences in impedance.
YMMV good luck