Check the listing for details. Bose Aviation Headset Active Noise Reduction GA Dual Plugs & Bluetooth Adapter. Condition: New other (see details). Listed at 659.00 USD. BOSE AVIATION HEADSETThese Bose Tactical Headsets have been modified to operate as a General Aviation Bose A20 Headsets:Include:Conventional Module Control Bose A20 (GA Electret High Impedance Boom Microphone, Set Control Cable and Dual Cable)Carrying CasePowered Battery: Operates with 2 alkaline AA batteries. Power on to activate the ANR (Active Noise Reduction)The headsets’ ear cushions contribute to the performance as well as the overall comfort of the same. These cushions are made of polyurethane foam inside a polyurethane filmThe Aviation Headsets incorporate Active Noise Reduction technology.Through the auxiliary audio input, you can plug-in a portable audio source for music. Warranty: One Year