The H10-13.4 is one of the best-selling, and longest lasting headsets in aviation history. Proven, reliable performance accompanied by remarkable comfort have made the H10-13.4 the top choice for pilots around the world. Super Soft, Double Foam Head Pad New Comfort gel, undercut ear seals Certified Noise Reduction Rating - 23 dB Reduced headband force Universal Flex Boom for perfect microphone placement Exclusive M-7A, the most advanced noise-cancelling microphone available Low-profile volume control knob with detent settings Molded cord assembly made to exceptional pull and flex standards 5-year Guarantee FAA TSO Approved C57 Cat. B and C58a Exceeds RTCA/DO-214 StandardsWeight (without cord assembly): 16.5 oz.