The easy-to-use Garmin echo 151 Sonar has excellent fish-finding power at a great value. Garmin HD-ID™ sonar reveals what's under the water with excellent target separation and image clarity. You'll be able to see fish, structures, and even your lure on the 4"- diagonal display with eight-level greyscale. 200 watts of transmit power (RMS). 77/200kHz frequency included (supports 50/200kHz). Comes with quick-release swivel mount and transducer with FREE mounting kits for transom and trolling motors.