Whether you're a recreational or professional angler . you'll appreciate the Humminbird Piranhamax 4 Fishfinder 410150-1 on your fishing trips. It features a 256-color 4.3-inch display that helps you pinpoint your potential catches. The Humminbird Piranhamax 4 utilizes Dual Beam sonar to penetrate up to 600' of water to find your fish. Its power output is 300 watts with 2 .400 watts of power peak to peak. You can mount the transducer either inside the hull or on the transom and it can be tilted and swiveled on its mount.