The Pilot System headset is designedspecifically for use in light aircraft andhelicopters.The headset is fitted with interchangeable leadswhich can be swapped easily for use in differentaircraft. Leads are available for connection to awide range of general aviation intercomequipment.Each headset includes a specially developedelectret noise cancelling microphone, anelectronic speech processor and high qualityspeakers.The microphone is sensitive to speech butrejects extraneous background noise whilst thespeech processor modifies the voice signal toproduce a clear and natural sound.The microphone is mounted in a rubberanti-shock holder and is protected by a foamwind shield that can be removed easily forcleaning or replacement.The headset speakers are housed inacoustically balanced enclosures which seal theheadset against moisture and also allow theear-cups to be cleaned hygienically. Thespeaker volume is adjustable and can be setusing the built-in volume control.The headset is noise attenuating and provideshearing protection in noise levels up to11OdB(A).All Lynx headsets are fitted with Silicone Gel earseals and are fully adjustable.Headset Colors:Black, White, Grey, Red, Pink, Blue, Yellow or GreenHelmet Sizes:To obtain the correct size of helmet, use a tape measure to measure the circumference of your head just above the ears.Small: 55-57cm, Medium: 57-59cm, Large: 59-61cm, Extra Large: 61-63cm.Small: 22″, Medium: 23″, Large: 23.5″, Extra Large: 24.5″.