Replace for Humminbird720073-4 Boat Ethernet Cable, AS EC 30E Ethernet Cord 30ft, Fit for APEX, SOLIX, Onix, ION, 1100/1100 HD, 900/900 HD, 800/800HD, 700 HD Series (30 Feet). Extensive Application: Designed for seamless connection of two Ethernet-capable units or integration with accessory switches.
eBay