I have a RVND 7710 in the coach & like it so well that I bought it's smaller brother, the RVND 5510 for the Ford Explorer Toad.
Have NOT been able to lock onto any GPS satellites & believe the problem is the Metallic black dots embedded in the windshield.
I see that both units have external GPS antenna ports. Does anyone know what GPS external antennas are compatible?
And what is the correct external antenna connector it is???
I think it is a MMCX? Male or female????
Anyone have & use an external antenna, what's the Make & model, and where did you get it??? Rand McNally Website/Store is totally useless.