The 587ci Combo features a brilliant color 320V x 240H 4.5" display, Dual Beam sonar with 2400 Watts PTP power output, 16-channel internal GPS Chartplotting with built-in UniMap, a card slot for maps and saving waypoints, and a Tilt & Swivel Quick Disconnect Mounting System. The new design also allows drop-in replacement for competitive in-dash models. Maximize your angling experience with the Humminbird 587ci fishfinder GPS system.