The GPSMAP 76CSx adds a whole new dimension to the mariner-friendly 76-series navigators: a high-sensitivity GPS receiver, barometric altimeter and electronic compass, microSD™ card slot, color TFT screen and turn-by-turn routing — features that have made the 76CSx and its counterpart, the GPSMAP 76Cx, a mainstay among serious outdoor enthusiasts. Storing data is easier than ever with the 76CSx's removable microSD card. This included blank card stores up to 128 megabytes (MB) of optional maps or other data. The card slot is located inside the waterproof battery compartment, so you don't have to worry about getting it wet. When navigating on the road, the 76CSx provides turn-by-turn directions to your destination. It also accepts optional preloaded microSD cards with MapSource® data for your off-road or marine excursions.