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**Please NOTE: This book is included free with the Flight Engineer Test Prep book
The amplified dynamic noise-canceling microphone is engineered to reduce background noise and deliver crisp voice transmission in busy cockpit environments
pH concentrate = 13
Since this item has been retired
Pilot USA PA-80H/iPhone Audio Recorder Adapter for Helicopter Headsets PA-80S/HERO3 **Please NOTE: This book isPilot USA PA 80H iPhone Audio Recorder Adapter for Helicopter Headsets Record cockpit audio to your iPhone from single plug helicopter headsets. The PA 80H iPhone delivers balanced, clear intercom and ATC recordings for training. Designed for helicopter single plug headsets (TSAU single plug aviation models) Connects headset audio directly to iPhone smartphone TRRS input for recording Integrated impedance matching for balanced, low noise recordings