Humminbird 4086801 PiranhaMAX 176i Portable Dual Beam Fishfinder and Trackplotter with Portable Case Depth: 600 feet Mounting: Tilt and Swivel Mount Sonar: Dual Beam 4 inch 16 level grayscale display Internal GPS 16 level grayscale 240V X 160H 4 inch display with 1600 watts PTP power output with Dual Frequency sonar allows drop-in replacement for competitive in-dash models