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Garmin Nuvi 3790T
Magellan RoadMate 5175T-LM
Garmin Nuvi 3550LM
Garmin Nuvi 30
Garmin NUVI 2555LT
Garmin Nuvi 3790T GPS Receiver
Magellan RoadMate 5175T-LM GPS Receiver
Garmin Nuvi 3550LM GPS Receiver
Garmin Nuvi 30 - 3.5 in. Car GPS Receiver
Garmin NUVI 2555LT - 5.1 in. Car GPS Receiver
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Release Date
Apr 2010
Aug 2011
Jan 2012
Oct 2011
Sep 2011
Map capabilities
Map cartridges / Data cards, Download maps
Map cartridges / Data cards, Download maps
Map cartridges / Data cards
Internal, Map cartridges / Data cards
Map cartridges / Data cards
Designation
Automobile
Automobile
Automobile
Automobile
Automobile
Receiver type
12 Channels
12 Channels
Enhanced accuracy
WAAS enabled
Form Factor
Fixed
Fixed
Fixed
Fixed
Fixed
Input Method
Touch Screen, Voice Command
Touch Screen
Touch Screen, Voice Command
Touch Screen
Touch Screen, Voice Command
Screen Size
4.4 inch
5.0 inch
5.0 inch
3.5 inch
5.0 inch
User interface
Touch Screen, Voice Command
Touch Screen
Touch Screen, Voice Command
Touch Screen
Touch Screen, Voice Command
Average Rating
 4.3 stars
 3.8 stars
 3.9 stars
 3.7 stars
 3.7 stars
Navigation
80% Positive
20% Negative
Display
100% Positive
Usability
78% Positive
22% Negative
Maps
100% Positive