Includes two 300-watt, 4-channel amps, front and rear speakers and all required wiring. Amplifier easily mounts inside fairing. Features R.E.M.I.T. circuitry for excellent FM reception from a Class D amp. System is easily expandable to add speakers to lower fairings or lids. No upgrades required to factory charging system. Compatible with factory quick-detach Tour-Paks. Pre-tuned to factory radio, so zero adjustments are required, making installation very simple. Includes Ultra rear harness, which allows radio fader to control front/rear levels.