Down Imaging® to reveal cover and structure detail below your boat on a brilliant color, wide-screen 480V x 800H 7" display with CCFL backlight. Includes SwitchFire™ downlooking sonar, and chartplotting with LakeMaster® and Navionics® Platinum™ compatibility. DualBeam PLUS™ sonar with 4000 Watts PTP power output, GPS Chartplotting with built-in ContourXD map, and advanced Fishing System capabilities. Includes unit cover. Maximize your angling experience with the Humminbird 858c DI Combo fishfinder GPS system.