Nflightcam Audio+Power Solution for GoPro Hero5/6/7 Black (Helicopter Version)

Amazon.com Price: $119.99 (as of 02/06/2019 12:44 PST- Details) & FREE Shipping.

Records all headset audio, including intercom and ATC
Includes a noise-reduction circuit for crystal-clear audio
Works with standard U174/U92A headset/helmet plugs/jacks. Works with aircraft with built-in ANR headset (single-plug LEMO) by plugging into standard ports next to the LEMO plug

Usually ships in 24 hours