4 seat kit comes with required equipment needed for the rider in each seat, including; 1 NNT10 intercom, 2 NH100 in-helmet headsets (FRONT) 2 HEC10 cables and 2 HCF4 cables Dual band car to car radio Push to start cable In-helmet headsets (REAR) Intercom to headset cable (REAR) Cable to connect the NCR2 Radio to the NNT10 Intercom Antenna kit with mounting brackets and 16ft cable Mounting bracket sold separately. INTERCOM/RADIO KIT 4SEAT