Garmin Echo Map 50Dv Us Lakes with Transducer Version offered with preloaded LakeVu HD maps that include over 17,000 detailed lakes, of which more than5,700 HD lakes have 1" contours shoreline to shoreline Garmin DownVu scanning sonar provides a nearly photographic view of fish and structure under the boat Includes all-in-one 77/200kHz HD-ID / DownVu 8-pintransducer featuring a built-in fast-response water temperature sensor, along with transom and trolling motor mounts Includes: echo MAP 50dv preloaded with U.S. LakeV HD maps, 8-pin all-in-one 77/200kHz HD-ID / DownV transducer with transom and trolling motor mounts, power/data cable, tilt/swivel mount, flush mount, protective cover, and documentation Wirelessly connect to Apple (mobile digital device) for Blue Chart Mobile Compatible with LakeV HD Ultra, Blue Chart g2, and Blue Chart g2 Vision coastal maps (sold separately)