Garmin 240 Blue Fish Finder The 240 Blue is the premium model of the Garmin 240 Fish Finder - one of Garmin's most popular fishing systems - making it irresistable for deeper-depth anglers. As well as Garmin's patented See-Thrur technology to detect weak and strong signals that allow the angler to see fish in structure and thermoclines, the 240 Blue provides almost double the depth-finding capacity - 1500 feet, and the ability to scan a wider area. The Fishfinder 240 Blue offers offshore anglers 4,000 watts of power peak to peak (500 watts RMS) and dual frequency (50/200 kHz) for shallow or deep-water performance. The Fishfinder 240 Blue boasts a high-resolution, 240x240-pixel count on a four-level grayscale display. The unit's graphic whiteline provides a clear picture of the bottom hardness and contour. Features: 1500' depth capability 4-level grayscale display Alarms:shallow and deep water, fish by size, and low battery warning 240x240 pixels Power output of 4000 watts (peak to peak) Dual frequency transducer (15°/45°) Suitable for offshore fishing