The Humminbird 561 Fishfinder features a high resolution, 12 level grayscale 320V x 320H 5-Inch display, and a dual beam 82/200KHz sonar with 300 Watts RMS power output. Features include Freeze Frame, Real Time Sonar window, selective Fish ID, echo enhancement, split screen zoom, and wide or narrow cone split screen. The user-friendly technology includes custom digital readouts, large digit view, quick disconnect mounting, triplog, and X-press menu system. The package includes a transom mount transducer, installation hardware, and owner-Feets manual. Dimensions: 7.25-Inch W x 7-Inch H x 4-Inch D. One year parts and labor warranty.