Garmin Fish Finder ECHO 550C 5-inch 500W Color Sounder Sonar HD-ID 550 CGarmin FishFinders ECHO 550C w Power Cable 5 high resolution color display HD ID technology 500 W (RMS) transmit power Depths to 1,900 ft Beam width to 120 degrees With one of the best and brightest screens on the water, echo 550c redefines color sonar scanning for freshwater fishing. Get the Clearest Possible Picture echo 550c turns fish into sitting ducks. Thats because of its powerful sonar with 500 W (RMS) power and our exclusive HD ID target