GPSMAP 7616XSV J1939 SideV, ClearV and Traditional CHIRP Sonar with Mapping 16-inch Multi-touch Widescreen Chartplotter/Sonar Combo. 16-inch multi-touch widescreen display (1366×768 WXGA) preloaded with both BlueChart g2 and Garmin LakeV HD coastal maps. Built-in dual CHIRP sonar plus CHIRP ClearV and CHIRP SideV scanning sonar with the clearest images on the water (transducer sold separately). High-sensitivity internal 10 Hz GPS/GLONASS. Fully network capable for Garmin Marine Network and NMEA 2000, plus NMEA 0183 support. Supports premium GSD sonar module.