Easy-to-use 3.5 color fishfinder with built-in, high-sensitivity GPS; 480 x 320 pixels; Dual beam (50/200kHz) & CHIRP (77/200kHz) sonar; Ability to mark & return to hot spots, docks & ramps; Convenient keypad operation; Max depth: 1,600ft in freshwater, 750ft saltwater; Displays speed data; Bottom lock shows return from the bottom up; Water temperature log & graph; Split-screen zoom; Ultrascroll(R) displays fish targets at higher boat speeds; Smooth Scaling(TM) graphics provide uninterrupted imagery when switching between depth-range scales; Sonar history rewind to scroll back through images to mark missed waypoints; Built-in flasher for vertical fishing; Fish Symbol ID helps identify fish targets; AutoGain minimizes clutter & maximizes targets; Adjustable depth line measures depth of underwater objects; A-scope real-time display of fish passing through transducer beam; Water-resistant (IPX7); Includes water temperature sensor, transom & trolling motor mounts, tilt/swivel mount & power cable;