Made to support up to 2-channels of speakers. Used to add rear speakers to a bike. 1 kit works for both saddlebags. Can also be used to add speakers to tour pack. Split Backbone wire harnesses run from an amplifier in the fairing, down the length of the bike where left and right speaker lines split off to each saddlebag. Each saddlebag speaker line has a waterproof quick disconnect. Each kit comes with 2 stainless-steel wire inlets for the saddlebags, stainless mounting hardware, and 5 feet of speaker line for inside each bag. These wire kits come fully assembled, loomed and labeled.