A plug-and-play hub for high-speed data-sharing of multiple HDS, LCX, LMS, NSE and GlobalMap® products across your onboard network. Waterproof expansion ports resist corrosive marine environments. Unused expansion ports capped for future expansion. Robust 100-megabit switch for high-speed data transfer. Compatible with all Lowrance HDS models, plus 2007 and later LCX, LMS, X and GlobalMap® Lowrance models with yellow 5-pin ethernet connector. Transmits sonar graphing display/control on GlobalMap® and HDS chartplotters when networked with sonar-equipped Lowrance units. Rugged and fully waterproof to IPX7. Connectivity for up to four compatible head units per expansion module. Links with other Expansion Port modules for added/future expansion.