The color echo 501c is a Powerful, simple-to-use fish finder featuring built-in advanced HD-ID sonar with or without a 77/200 kHz transducer (supports a 50/200 kHz transducer, sold separately). Crisp 5-inch QVGA color display offers extra sharp resolution and detail on fish, structure and bottom returns with the Power to scan to a 2,300-foot maximum depth. With its simple, streamlined interface with 4,000 W peak-to-peak Power, the echo 501c has wide viewing-cone angles (60/120 degrees) optimized for targeting fish beyond the sides of the boat in deep or shallow water. Also includes Smooth Scaling depth-range adjustments and sonar history rewind. Ready-to-go with a quick-release tilt/swivel mount and transom/trolling transducer mount kit, so you can get right to fishing.