The Garmin Echo 200 allows you to get a clear view of what lies below, eliminating all the guesswork involved in catching the "big one". There's nothing fishy aboout this fishfinder's 300 watts RMS high sensitivty sonar and its big grayscale display that features a five inch screen. Unit is equipped with Garmin Smooth Scaling Technology to keep you from losing sight of the sonar history when the unit changes depth range. Installs in minutes.