Humminbird PiranhaMAX 150 4-Inch Waterproof Fishfinder 100 Watt, 200KHz Fishfinder 4-Inch , 4 level greyscale LCD 160V x 128H pixel resolution Includes transom mount transducer Fishfinder with four-inch, four-level grayscale display with 160 x 128 pixel resolution Single-beam sonar with 20-degree beam and 800 watts PTP power output; coverage equal to 1/3 depth Fish ID+ interprets sonar returns and displays Fish Symbol when requirements are met Programmable fish and depth alarms (fish alarm works together with Fish ID+) Transom-mount transducer included; one-year warranty