Designed for offshore fishing enthusiasts. Operates at dual frequencies. With the 50/200 kHz transducer, you can reach greater depths and get a wider viewing area. Crisp, four-level grayscale screen for excellent separation and contrast. Rugged and waterproof. Convenient adjustment bar that gives you access to the most commonly used fishing settings. Improved screen contrast and increased image update rate also set it apart from its freshwater counterpart. From the outside, this unit will resemble its freshwater counterpart. From the outside, this unit will resemble its freshwater version, with the size of the waterproof case and the keypad configuration remaining the same. 4000 watts power, peak-to-peak (500 RMS), 160x160 pixels and includes speed and temperature sensors.