The Marcum MX-7GPS Lithium Equipped GPS/Sonar System is a sonar and GPS combination unit for ice fishing. The MX-7GPS features a True-Time 7″ LCD display that provides clear readouts in true real-time with no lag or latency. The single-frequency sonar and patented interference rejection provide precise targets and enhanced clarity, while the internal GPS receiver and onboard Navionics® basemap give you plenty of information about the area. The MX-7GPS is powered by a dual-beam precision digital sonar engine that delivers industry-leading target separations you can discern fish from the bottom, fish from other fish, and even fish from your jig. The ultimate in sonar and mapping technology, the Marcum MX-7GPS GPS/Sonar System offers exceptional clarity in a ready-to-fish unit.