Humminbird 408980-1 500 561 DI Down Imaging and DualBeam Fishfinder 5-inch 16-level Grayscale LCD Display (320Vx640H) Built in Transducer, Down Imaging sees down to 350 Feet SwitchFire adapts for calm and rough conditions DualBeam PLUS employs two sonar beams for versatility 4,000-watt peak-to-peak, 500-watt RMS 5 inch Display * 320 X 320 Pixels * 2,400 Watts Ptp Power Output Sonar Echo Enhancement * True arch Technology