The MFJ-5124K cable connects your MFJ-991, MFJ-993, or MFJ-994 Intellituner to your supported Kenwood radio. The cable supports:

Kenwood TS-50S
Kenwood TS-450S
Kenwood TS-570S
Kenwood TS-690S
Kenwood TS-850S
Kenwood TS-870S
Kenwood TS-2000
Any Kenwood radio that supports the AT-300 or AT-50 tuner.

The MFJ-5124 Radio Interface main unit contains all the electronics that allows users of FC-30 compatible Yaesu Transceivers, and certain Yaesu Transceivers with supported CAT system to connect to the MFJ-991,  MFJ-993 and MFJ-994 IntelliTuner@ Automatic Antenna Tuners. With this interface, DC power to the radio interface and the supplied tuner is supplied by the radio, except FT-847 CAT.  Using the appropriate cable and selecting the interface protocol via internal jumpers allow one-button automatic tuning operation with various Yaesu transceivers.