Narco's DME-190 TSO is an old DME with questionable (and declining) reliability. We do not recommend the DME-190 TSO for new installations. The only use case for the DME-190 TSO is to replace an existing DME-190 TSO (or DME-190) when it goes bad, and the budget or schedule do not allow for the installation of a different radio.
This radio has a single digital display that may be switched between Miles, Time-To-Station, and Groundspeed.
Please note that forced cooling is required for proper operation and warranty coverage.
Many of our DME-190 TSO's, like the one pictured here, have a refurbished face plate and look very clean. These are used avionics that don't look used up! Most come with a Black faceplate, but we may have them available in Tan as well.