TKM MX300 with a display problem. I believe the only problem is one dead digit on the NAV side. It is the first digit which in general aviation frequencies is always 1. However, make sure your installer is OK with this in advance or plan on having it repaired as no returns will be allowed. Tested transmitting at a healthy 18.5 watts. No tray or paperwork included. As is, for parts or repair, no returns or refunds.