Humminbird 4086701 PiranhaMAX 176i Dual Beam Fishfinder and Trackplotter with Internal GPS Depth: 600 feet Mounting: Tilt and Swivel Mount Sonar: Dual Beam 4 inch 16 level grayscale display Internal GPS 4" Display With 16-level Grayscale 240 X 160 Pixels 200w Rms Power 1,600w Ptp Power Includes Water Temperature