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Cobra 4000
TomTom Via 1530m
Garmin eTrex 20
Garmin GPSMAP 78
Garmin Foretrex 401
Cobra 4000 GPS Receiver
TomTom via 1530m - 5 in  Handheld GPS Receiver
Garmin eTrex 20 GPS Receiver
Garmin GPSMAP 78 GPS Receiver
Garmin Foretrex 401 Wearable Wrist GPS
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Release Date
Feb 2007
Jun 2012
Aug 2011
Apr 2010
Jun 2009
Form Factor
Handheld
Handheld
Handheld
Handheld
Handheld
Map capabilities
Internal
Internal, Map cartridges / Data cards
Receiver type
12 Channels
Designation
Automobile
Handheld, Automobile
Outdoor, Hiking
Outdoor
Outdoor
Enhanced accuracy
WAAS enabled
WAAS enabled
WAAS enabled
Input Method
Keypad, Touch Screen
Touch Screen
Touch Screen, Keypad
Keypad
Keypad
Screen Size
5.0 inch
8.6 inch
2.2 inch
2.7 inch
1.7 inch
User interface
Keypad, Touch Screen
Touch Screen, Keypad
Keypad
Keypad
Average Rating
 3.8 stars
 n stars
 n stars
 n stars
 n stars