Embodying the all-American philosophy of bigger is better, the Montana brings the whole package. The super-bright 4" displays gives an unrivalled level of detail to OS mapping and a massive 3GB memory gives you ample room for thousands of routes and waypoints. All the key outdoor features are present: 3 axis-compass, barometric altimeter and the HotFix® satellite receiver for pinpoint accuracy, but with a lithium rechargeable battery pack you can combine with AAs for an enormous 22 hours of activity.

With the Discoverer map included, you have all of Great Britain to explore in OS 1:50,000 scale. What's more you can add the auto mount kit and use the Montana as a wide screen in-car GPS, with voiced turn-by-turn directions using detailed Navteq road data. The Montana is the true giant of sleek GPS navigation.

• Includes 1:50K GB Discovererâ„¢ microSDâ„¢ card - a detailed OS map of the whole of Great Britain, with Navteq road data for in-car use with turn-by turn directions. 
• 4" sunlight readable transflective colour touchscreen - scroll through maps easily in incredibly bright detail, with dual orientation.
• Supports paperless geocaching - just upload the GPX file from Geocaching.com and start your hunt.
• Barometric altimeter - uses air pressure to give you detailed altitude readings which is crucial for accuracy on steep inclines.
• 3-axis compass - no need to hold it steady for accurate readings.
• WAAS-enabled HotFix® technology with high sensitivity receiver - unrivalled accuracy will keep track of you even under deep cover.
• Rugged waterproof casing (IPX7) - will withstand rain, dust, dirt and mud.
• BirdsEye Satellite Imageryâ„¢ (subscription required) - download satellite images to integrate with your maps.
• Share using Garmin Connectâ„¢ - a fantastic online forum with millions of users worldwide.
• Connects with Garmin Basecampâ„¢ - plan your routes, tracks and waypoints before you head out.
• Worldwide base map - gives you OS grid or lat/long references with shaded relief for elevation.
• 3GB on-board memory & microSDâ„¢ slot - room for 4000 waypoints with the option of storing huge areas of added maps such as City Navigator.
• Lithium-ion rechargeable battery pack - gives you 16 hours of use or 22 when combined with AA batteries.
• Custom mapping - convert old paper maps into electronic files to use with your device.
• Recommended activity - walking / geocaching / off-roading