The new ProFlight Series 2 builds upon the advanced technology of the original and is the most lightweight, compact and comfortable aviation headset Bose has ever produced. ProFlight Series 2 is engineered and refined for the way professional pilots fly and now offers numerous updates and enhancements based on pilot input. ProFlight Series 2 features a new lighter, thinner more flexible cable providing increased freedom of movement and improved tap control for talk-through communication. Like the original, the ProFlight Series 2 is FAA TSO and E/TSO-C139a certified. Additionally, a new non-Bluetooth variant of the ProFlight Series 2 is now available.