HIGHEST SPEC CASTABLE SONAR: casts further, scans deeper, more features than any other. Syncs with iOS/Android devices. Use for shore, boat, ice fishing | INBUILT GPS: enables you to create bathymetric maps from the shore, Enjoy free access to Lake book, Deeper' s bathymetric management platform where you can save, review and analyze all of your maps on any device from the comfort of home | ROCK SOLID CONNECTIVITY: Syncs to phone/tablet using WiFi (like a hotspot). NO INTERNET IS NEEDED. Turn OFF Cellular data for uninterrupted connection | INCREDIBLE DATA: Scans down 260ft, 0.5" target separation, dual beam (broad/narrow), 15 scans per sec. Map depth, find structure, vegetation and fish | BOAT FISHING: Install in secs, no cables or batteries, smooth trolling. ICE FISHING: 3.5oz, no cables, flasher display + zoom, 0.5" target separation