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Both the improved 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 technology — but each is designed for different flight deck and cockpit environments.
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