Marine, Automobile - Alarm, Fish Finder, Keypad, Map, Chart Plotter, Depth Display, Display - Color, Recorder, Sonar / Sounder, Split Screen, Touch Screen, Trip Calculator, Voice Navigation Instruction, Water Temp. Sensor - Battery, Display Unit, Maps Software, Mounting Unit, Navigation Kit, PDA Kit, Power Adapter, Vehicle Mounting - Fishfinder, GO, GPSMAP

features an ultra-bright 5" qvga display along with an improved high-speed digital design for faster map drawing and panning speeds. plus these waterproof units have a high-sensitivity internal gps receiver so mariners will always know their position at sea. it's ready to go with a built-in satellite enhanced worldwide basemap and garmin's proven easy-to-use interface designed to help mariners navigate the open waters with ease.features and specifications: ultra-bright 5" diagonal qvga display 240 x 320 pixels - over 800 nits of brightness nmea 2000 certified for seamless integration with the garmin marine lineup preloaded worldwide marine basemap compatible with gxm 51 for xm satellite radio and xm wx satellite weather built-in high-sensitivity gps receiver high-speed processor for fast screen redraws and smooth panning streamlined user interface makes it simple to select modes and features single sd memory card slot for bluechart g2 vision cards as well as saving waypoints routes and tracks to an sd card optional bluechart g2 vision cards provide marine chart detail and enhanced navigation features like auto guidance satellite imagery 3-d mariner's eye view and 3-d fish eye view backlit keypad for easy operation in low light conditions unit dimensions: 5.9"h x6.4"w x 2.9"d power output: 500 watts (rms) 4000 watts (peak to peak) dual frequency depth: 1500 feet/500 meters (dual beam) use a dual frequency transducer 50 khz (45 degrees) 200khz (10 degrees) for maximum saltwater performance patented transom/trolling mount transducer ultrascroll high rep rate sonar provides lightning-fast screen updates autogain technology enhances target visibility see-thru technology shows weak and strong returns simultaneously water temperature log graphically records water temp data a-scope whiteline adjustable depth line helps gauge desired fishing levels and bottom clearance split zoom display offers a closer look at fish targets and bottom structure 2x 4x and bottomlock zoom adjustable keel offset alarms for fish size shallow water deep water and low battery product : garmin gpsmap 521s gps chart fishfinder w/tm xducer manufacturer : garmin manufacturer part no : 010-00760-01