It takes 40 hours of flight time to become an aviation pilot. Model H10-13.4 It takes millions of hours of flight time to become an aviation legend. The David Clark Model H10-13.4 H10 13.4 may be the longest and best-selling best selling headset in the history of aviation. It's logged millions of flight hours in thousands of aircraft. And for some very good reasons − outstanding comfort, rugged durability and reliability you can count on, flight after flight. Which probably explains why so many pilots that learn to fly with the H10-13.4, keep flying with the H10-13.4. Visit www.davidclark.com or call 800-298-6235 for more information. © 2020 David Clark Company Incorporated ® Green headset domes are a David Clark registered trademark. W W W. D AV I D C L A R K . C O M An Employee Owned American Companyhttp://www.davidclarkcompany.com/ http://www.davidclark.com