3490 connectors - are incompatible with 3790.
only transient (hybrid) models are compatible with each other.
color psb in 3760 - blue, in 3490 - green - but there are exceptions.
I have a transitional model - 3490 - but the display from 3790 and gps chip mt3328 not nl5500 -and positioning accuracy of about 5-9 meters
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