Garmin 010-01524-01 echoMA 74dv Chartplotter with U.S. BlueChart g2 and Transducer THE POWER OF SIMPLE - Easy-to-use, easy-to-install chart plotter/sonar combo with sunlight-readable, auto-dimming display and back-lit keypad. CLEAREST SCANNING SONAR ON THE WATER - echo MAP dv series come with built-in 500 W (RMS) traditional HD-ID sonar and Down V scanning sonar capabilities BEST-IN-CLASS INTERNAL 5 Hz GPS - 5 Hz Internal GPS updates position and heading 5 times per second to make marking and returning to waypoints easier Includes: echo MAP 74dv with U.S. Blue Chart g2, power/data cable, quick-release mount, flush mount, protective cover, GT21-TM transducer(50/200kHz/, 4-pin), transom mount, hardware, documentation