Garmin Echo Map 70 Dv US Offshore 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 70dv preloaded with U.S. Blue Chart g2 maps, 8-pin all-in-one 77/200kHz HD-ID / DownVu transducer with transom and trolling motor mounts, power/data cable, bail mount, flush mount, protective cover, and documentation Supports SideVu and DownVu with CHIRP scanning sonar technology (requires GCV 10, sold separately). Optional maps can be shared with multiple networked Garmin displays on the boat