The KA-1 and P1 headsets are made for general aviation use with the standard dual plugs. They will not work out of the box on helicopters. There are adapters that can turn a general aviation headset into a helicopter set; however, there could be issues related with the adapter that can degrade the quality of the headset. We do not advise customers to purchase the KA-1 and P1 headsets for helicopter use with an adapter.