Raymarine Dragonfly-4DV CHIRP DownVision Sonar 4.3" All-weather, high-definition LED backlit display Optically bonded for sharp color, wide viewing angles and no internal fogging Award winning wide-spectrum CHIRP DownVision sonar technology for photo-like images, high-speed tracking, and better deep water resolution Ball and socket tilt swivel mount lets you mount Dragonfly easily on any surface Includes transom mount CHIRP transducer with temperature sensor