Garmin 010-01184-00 GPSMAP 1040xs Chartplotter/Sonar Combo with DownVu Transducer Keyed chartplotter/sonar combo with 10-inch color SVGA display Preloaded U.S. LakeVu HD and Blue Chart g2 coastal maps High-sensitivity internal 10 Hz GPS/GLONASS receiver Built-in Garmin HD-ID 1 kW sonar, CHIRP and DownVu scanning sonar with CHIRP technology Supports all Garmin marine radars