The 587ci HD DI Combo features a brilliant color 640V x 480H, 256 color, 4.5 display. Down Imaging sonar with 4000 watts PTP power output, precision internal GPS Chartplotting with built-in UniMap cartography, a card slot for optional maps and saving waypoints along with a Tilt Swivel quick disconnect mounting system. The design also allows for drop in replacement capability for competitive in-dash models. Maximize your angling experience with the Humminbird 587ci HD DI Combo.