Garmin Montana Marine Bundle - Mount, AC Charger, USB, Battery Pack, Docs. & Pre-Loaded w/Bluechart g2 f/U.S. Basemap Yes; Internal/External Antenna NONE; Resolution (VxH) NONE; Screen Size 4"; Screen Type Color; Touchscreen NONE; Waterproof Rating Waterproof; Waypoints/Routes NONE; Weather Capable NONE Card Format Micro SD Cartography - Preloaded Yes Cartography Brand Garmin Cartography Type Bluechart G2