The user-friendly Garmin echo 151DV Sonar clearly reveals what's under the water, helping you catch more fish. It uses Garmin DownVü™ that produces clear and precise HD-ID™ sonar images and a nearly photographic sonar view of fish and structure under your boat. Images are clearly shown on a 4"- diagonal eight-level grayscale display. 200 watts of transmit power (RMS). Includes an all-in-one transducer for DownVü and 77/200kHz (also supports 50/200kHz with optional transducer). Comes with a quick-release swivel mount and free mounting kits for transom and trolling motor.