With its high-sensitivity, WAAS-enabled GPS receiver and HotFix satellite prediction, GPSMAP 78 locates your position quickly and precisely and maintains its GPS location even in heavy cover and built-up areas. Adding more maps is easy with Garmin’s wide array of detailed marine, topographic and road maps, available on microSD card. Conveniently plug in BlueChart® g2 preloaded cards for a great day on the water or City Navigator NT® map data for turn-by-turn routing by road (see maps tab for compatible maps). The card slot is located inside the waterproof battery compartment, so you don’t have to worry about getting it wet. GPSMAP 78 also supports BirdsEye Satellite Imagery (subscription required), that lets you download satellite images to your device and integrate them with your maps. In addition, the 78 is compatible with Custom Maps, free Garmin software that transforms your own paper and electronic maps into downloadable maps for your GPS handheld device. With a simple connection to your computer and to the Internet, you can get a detailed analysis of your activities and send tracks to your outdoor device using Garmin Connect. This one-stop site offers an activity table and allows you to view your activities on a map using Google Earth. Explore other routes uploaded by millions of other Garmin Connect users and share your experiences on Twitter® and Facebook®. In The Box GPSMAP 78;Wrist strap;USB cable;Quickstart Guide.