Up for sale is a Garmin GNC 355 GPS/COM 010-04956-00.  Technical info is as follows:

P/N:  010-04956-00

S/N: 5YR007267

MODS: None-

Volts: 14 / 28 VDC

Comes with Tray, and Backplate. It is in an excellent condition. If you have any questions, please feel free to ask! Happy buying!