The SeaTalk ng Backbone kit contains everything you need to construct and wire a basic SeaTalk ng navigation network backbone on board your vessel. , The kit contains the following components: A06031 SeaTalk ng Terminators (Qty. 2), A06037 Backbone Cable, 20m, A06036 Backbone Cable, 5m (Qty. 2), A06028 T-Piece (Qty. 4), A06049 Network Power Cable, 81300 SeaTalk ng Reference Manual , ST70 Displays, transducer pods, transducers and network spurs are not included.