Product Description The Pro Plus is designed for the discerning professional pilot who needs the ultimate in performance in a TSO certified headset. Robust wiring, exceptionally stable microphone boom, and our legendary comfort combine to make this the best option for the career pilot. The fact that the hearing protection is so good that it can go seamlessly from an airliner to an aerobatic plane just adds to the appeal of the Pro Plus. Purchase also includes 6 pairs of medium tips, sample pairs of small and large tips, semi-rigid ballistic nylon carrying case, lapel clip, Quick Start Guide