Garmin Fishfinder 400C 4-Inch Waterproof Fishfinder and Dual Frequency Transducer Adaptable to both freshwater and saltwater conditions, with dual-frequency transducer Ultra-bright, 4-inch, full-color QVGA display with 320 x 240 pixels of resolution UltraScroll updates screen at live-action speeds, while night mode provides low-light readability Built-in CANet connectivity enables sonar data to be shared with other chartplotter displays Weighs 1.5 pounds and measures 5.72 x 5 x 2.73 inches (W x H x D)