Lowrance HDS 7 is a large-but-compact solution with 6.4"/17.8 cm full VGA color viewing that renders astounding fishfinder and navigation details. It also includes the new SolarMAX™ PLUS bright-sunlight/wide-angle display with pure-white LED screen/keypad backlighting that fully adjusts to zero-dim for night vision. Same for the built-in Broadband high-definition fishfinder technology and the high-sensitivity 16-channel GPS+WAAS antenna. HDS built-in cartography choices include Enhanced U.S. Basemap, or the amazing, life-like and new Insight USA™ with combined Inland and Coastal coverage. Fully compatible with all Navionics® chartcards— Platinum+, Platinum, Platinum HotMaps— with one high-speed SD card slots. Fully ready to build your complete stand-alone or networked onboard system. Dual frequency transducer 50/200 kHz.