BOSE A20 AVIATION HEADSET Proven Bose technology in our most compact headset. Both the ProFlight Series 2 and the A20 Aviation Headset are products of decades of research and development. Both are FAA TSO certified. ProFlight Series 2 is E/TSO-C139a certified and the A20 Aviation Headset is E/TSO-C139 certified. Both headsets feature advanced noise cancellation technologybut each is designed for different flight deck and cockpit environments. Get yours at boseaviation-EMEA.aero/shops PROFLIGHT SERIES 2 AVIATION HEADSET Connect with us @BoseAviation 2022 Bose Corporation. All rights reserved.