5" diagonal display. 480 x 640 pixels resolution. This freshwater chartplotter boasts the bright, sharp, and colorful graphics. Preloaded, detailed maps of U.S. inland lakes; and simple, straightforward buttons and menus. Simple user interface for easy operation-With fewer buttons to push and fewer operational steps to navigate, the GPSMAP 535's simplified menu format makes it easy for you to see and select the data you want to access on-screen.You can add the optional BlueChart g2 Vision SD card for even more enhanced features.The sounder version, GPSMAP 535s, comes with a powerful digital sounder (up to 1 kW) and dual beam transducer that clearly paints depth contours, fish targets and structure. It’s also CANet™ compatible