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 California Proposition 65 Warning: This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For additional information regarding Proposition 65 warnings, please review California Proposition 65 consumer information.