Raymarine Dragonfly-5 Pro Sonar/GPS with US C-Map Essentials 5" All-weather, high-definition LED backlit displayOptically bonded display for sharp color, wide viewing angles, and no internal fogging Dual-channel sonar - wide-spectrum CHIRP DownVision sonar for photo-like images and a second CHIRP conventional sonar channel for targeting fish Stream live sonar data to your smartphone with Raymarine's Wi-Fish mobile app; With the Wi-Fish you can rewind, save and share the day's catch with friends on your favorite social networks Removable mounting ball is compatible with aftermarket ball and socket mounting systems for more mounting options Internal storage for 3000 waypoints and 15 tracks; Use optional microSD memory cards for expanded storage