Engineered to be the ideal aviation headset for commercial and airline pilots who fly moderately noisy, pressurized turbine-powered aircraft, the proflight Series 2 adapts to unique environments and personal preferences of Pro pilots. refinements to the proflight Series 2 include a thinner, lighter and more flexible cable and the addition of Winglets on the mic boom to assist in correct mic alignment and adjustment. Tap control for talk-through communication has been updated. Additionally, the carrying case has been improved to aid in easier storage and transportation. proflight Series 2 is the industry smallest, quietest and most comfortable active noise cancelling aviation headset, and is the most innovative aviation headset Bose has ever produced. Proflight Series 2 offers advancements to the technology of the original proflight and features improvements based on feedback from the aviation community. the uniquely comfortable and stable design of the proflight Series 2 weighs just 4. 5 ounces (128 grams) on-head – light enough to remain comfortable even on the longest flights. The headset also features three user selectable modes of active noise cancellation, active equalization, a noise cancelling microphone, tap control for talk-through communication with those outside the intercom and optional full-function Bluetooth connectivity. The proflight Series 2 is FAA Tso and e/tso-c139a certified, Meets all applicable arinc standards and is available with four different plug configurations.