Garmin GPSMAP 521s 5-Inch Waterproof Marine GPS and Chartplotter (Without Transducer) Internal/External Antenna Internal; Waterproof Rating Waterproof; Waypoints/Routes 3000; Weather Capable Yes; Cartography Type Bluechart Vision; Basemap Yes; Card Format SD; Cartography - Preloaded No; Cartography Brand Garmin; Frequency NONE; Watts RMS - Max NONE; Transducer Type NONE; Speed/Temp NONE; Included Transducer NONE Resolution (VxH) 234 x 320 Screen Size 5" Screen Type Color Touchscreen No