Raymarine STNG Backbone Kit: Comprehensive kit includes Two Terminators, Power Cable, 4 T-Piece Connectors, and varied Backbone Cables. Enables easy connection of individual SeaTalkNG devices through color-coded, quick-connect, IPx6 waterproof plugs and sockets. Ideal for expanding or updating SeaTalkNG systems. Features iTC-5 component for transducer signal conversion and HS-5 switch for SeaTalk-HS data distribution.