David Clark 40535G-01 U3816 Dual Radio Interface Headset Station ICOM A21 It combines trusted passive noise

It combines trusted passive noise reduction with active electronic noise cancelling to help reduce low-frequency engine and prop noise

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Beechjet 400T (T-1A)

David Clark 40535G-01 U3816 Dual Radio Interface Headset Station ICOM A21 It combines trusted passive noiseDavid Clark 40535G 01 U3816 Dual Radio Interface Headset Station Dual radio interface station for integrating two mobile radios with a single headset. Designed for flexible, high reliability communications in mobile and field operations. Key Features & Benefits Interfaces two mobile radios to one headset for streamlined control Independent push to talk (PTT) controls for each radio channel Simultaneous receive from both radios shared across intercom