Product Comparison

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Montana® 680t
$599.99 USD
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Remove this device from comparison.
GPSMAP® 276Cx
$699.99 USD and Up
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Print Remove this device from comparison.
Montana® 680t
$599.99 USD
Buy Now
Remove this device from comparison.
GPSMAP® 276Cx
$699.99 USD and Up
Buy Now

Touchscreen GPS/GLONASS device with preloaded TOPO maps and 8 megapixel camera

Versatile GPS/GLONASS navigator with internal antenna

General

Physical dimensions 2.9" x 5.7" x 1.4" (7.48 x 14.42 x 3.64 cm) 7.5" x 3.7" x 1.7" (19.05 x 9.40 x 4.32 cm)
Touchscreen
Display size 2"W x 3.5"H (5.06 x 8.93 cm); 4" diag (10.2 cm) 5.0" (127.0 mm) diagonal
Display resolution 272 x 480 pixels 800 x 480 pixels
Display type bright, transflective 65K color TFT, dual-orientation touchscreen; sunlight readable bright, sunlight readable WVGA display
Weight 10.2 oz (289 g) with included lithium-ion battery pack; 11.7 oz (333 g) with 3 AA batteries (not included)

15.9 oz (450 g) with included rechargeable pack; 14.6 oz (415 g) with AA batteries (not included)

Battery type rechargeable lithium-ion (included) or 3 AA batteries (not included); NiMH or Lithium recommended rechargeable lithium-ion (included) or 2 AA batteries (not included); NiMH or Lithium recommended
Battery life

up to 16 hours (lithium-ion)
up to 22 hours (AA batteries)

up to 16 hours (lithium-ion)
up to 8 hours (AA batteries)

Water rating IPX7 IPX7
High-sensitivity receiver
Interface high speed mini USB and NMEA 0183 compatible high speed mini USB and NMEA 0183 compatible
Memory/History 8 GB (user space varies based on included mapping) 8 GB (6 GB available to use)

Maps & Memory

Preloaded maps

yes (TOPO U.S. 100K; not routable)

yes (City Navigator®)

Ability to add maps
Basemap
Automatic routing (turn by turn routing on roads) Yes (with optional mapping for detailed roads) Yes (with optional mapping for detailed roads)
Map segments 3500 15000
BirdsEye 250 BirdsEye Imagery files 250 BirdsEye Imagery files
Includes detailed hydrographic features (coastlines, lake/river shorelines, wetlands and perennial and seasonal streams) yes (preloaded City Navigator version)
Includes searchable points of interests (parks, campgrounds, scenic lookouts and picnic sites) yes (preloaded City Navigator version)
Displays national, state and local parks, forests, and wilderness areas yes (preloaded City Navigator version)
External memory storage yes (32 GB max microSD™ card) yes (32 GB max microSD™ card)
Waypoints/favorites/locations 4000 10,000
Tracks 200 250
Track log 10000 points, 200 saved tracks 20000 points, 250 saved tracks
Routes 200, 250 points per route; 50 points auto routing 250, 250 points per route; 50 points auto routing

Sensors

GPS
GLONASS
Barometric altimeter
Compass Yes (tilt-compensated 3-axis) Yes (tilt-compensated 3-axis)
GPS compass (while moving)

Daily Smart Features

VIRB® Remote
Pairs with Garmin Connect™ Mobile
Active Weather 
Smart notifications on handheld

Outdoor Recreation

Point-to-point navigation
Compatible with BaseCamp™
Area calculation
Hunt/fish calendar
Sun and moon information
Geocaching-friendly yes (Geocache Live)
Custom maps compatible yes (500 custom map tiles) yes (500 custom map tiles)
Picture viewer
Camera

yes (8 megapixel with autofocus; automatic geo-tagging)

Connections

Wireless connectivity

yes (Wi-Fi®, BLUETOOTH®, ANT+®)