Travelers and computer-phobes alike will enjoy the simple convenience of Garmin s preloaded MapSource data cards-just insert and go Tiny 256 MB microSD TransFlash card comes preloaded with 100K scale Topo maps for convenience when traveling no need to download Cards are compatible with all X-series Garmin GPS units including Legend Cx, Vista Cx, GPSMAP 76Cx and GPSMAP 60CSx and 60 Cx. Please note: Cards are not write protected and can be written over. lost map data will not be replaced after purchase. This card covers the state of Alaska. See Region 1 in coverage map image.