The Raymarine SeaTalkNG Backbone Cable Kit contains everything you need to construct and wire a basic SeaTalkNG navigation network backbone onboard your vessel. The kit includes the following components:* (2) SeaTalkNG Terminators (part # A06031)* (1) 20m Backbone Cable (part # A06037)* (2) 5m Backbone Cables (part # A06036)* (4) T-Piece Connectors (part # A06028)* (1) Network Power Cable (part # A06049)* (1) SeaTalkNG Reference Manual (part # 81300) Network power cable; SeaTalkNG reference manual | Raymarine SeaTalkNG Backbone Cable Kit for ST70