The David Clark headset H10-13.4 is the best selling noise-attenuating headset. No other headset has been able to match it for comfort, performance and reliability. Its lightweight design and outstanding comfort features reduce fatigue during flight. Low-profile volume knob with detent settings guards against accidental volume shifts. Durable construction includes a moulded cord assembly made to exceptional pull and flex standards. The H10-13.4 is the headset that sets the quality and performance standards for the entire industry.