With a highly sensitive GPS receiver inside, the Garmin GPSMAP 640 helps you to smoothly navigate in the water. This marine chart plotter is also an on-road navigator that guides you with voice-prompted and turn-by-turn directions. This Garmin GPS receiver features a 5.2-inch WVGA color touchscreen that is easy to view and operate. You can store additional maps on this Garmin GPS receiver, thanks to the SD expansion card slot. Sporting a sleek and portable design, you can always carry the Garmin...
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