echo 500c scans the waters with 500 W (RMS) power and extra-sensitive HD-ID target tracking technology, and boasts a 5" (12.7 cm) QVGA display. A dual-beam transducer optimizes performance for deep or shallow water, offering wide-angle (up to 120 degree) coverage to target fish beyond the sides of your boat and the ability to scan bottom profiles down to 1,900 ft (579.12 m) in fresh water. For an uninterrupted view of the sonar image, echo 500c has Smooth ScalingTM technology, which means you won"t lose sight of the sonar history as the unit changes depth ranges. It also features the ability to rewind your sonar history in order to ensure that you haven"t missed a thing.