I use the original (ie not the II) microKEYER interface box from microHAM. It works fine with both my ICOM rigs - main rig is the 756 ProIII and secondary rig is the 706 MkIIG. I use it with Writelog for CW and SSB and with other applications for data modes. It supports multiple applications. I find it very reliable. Geoff G4FKA