Garmin GPS Map 78S comes with a barometric altimeter, high sensitivity receiver,3-axis compass, high sensitivity receiver, and a micro SD card slot to load some extra maps. The 78s also comes with the benchmarking of IPSX7 waterproofing along with that it even floats. Users can effortlessly share their waypoints, tracks, routes, and geocaches wirelessly with other compatible devices. It has a USB port to transfer the files in less time. Product Specification: Dimension -3.05 x 6.6 x 15.24. Weight - 218.29. Battery life- 20 hours Battery- 2AA Display Size- 2.6 inches Built- in-memory- 1.7 MB