350-ft. Down Imaging Range/600-ft. 2-D sonar range
200/455/800kHz DualBeam PLUS sonar coverage
The ultrabright 5" screen of the Humminbird 678c HD DI Sonar offers excellent 640x480-pixel resolution that displays the detail of Humminbird's Down Imaging® technology and the power of SwitchFire™ sonar. 350-ft. Down Imaging range/600-ft. 2-D sonar range. 200/455/800kHz DualBeam PLUS™ sonar coverage. 500 watts (RMS)/4,000 watts peak-to-peak power output. Quick disconnect mount.