The Colorado™ 400c comes adventure-ready with an innovative Rock n Roller input wheel, high-sensitivity GPS receiver, electronic compass, barometic altimeter and color TFT screen.

Preploaded with cartography for different area BlueChart g2 marine charts, inland lake data or TOPO contour maps.

All models come equipped with worldwide basemap and a rugged, slim case that's waterproof to IPX7 standards.

Optional SD cards are sold separately to enable extra mapping detail and to broaden coverage.

The Garmin Colorado™ 400c GPS handheld is the ultimate in outdoor exploration gadgets.

"The images were great and it worked flawlessly giving us information on marinas, anchorages, depths, and island information. It made our trip easy and I would highly recommend it for water use."
 actual user feedback on Amazon.com

"The marine detail for the Great Lakes and Oceans surrounding the U.S. is outstanding on this unit. I purchased it primarily as a backup device for the GPS..." 
actual user feedback on GPSnow.com