Amazon.com: Airplane Cockpit Intercom ATC Radio Recording Cable with Power Cable Adapter Audio Cable for GoPro HERO3 / HERO3+ / HERO4 NOT for Hero 5 and UP : Electronics
NFlightCam GoPro Audio Adapter Cable
GoPro Connect Cable to Intercom AUX port – Rugged Radios
Amazon.com: V2 18FT ATC Radio Audio Recording Cable with Dual Output for Gopro Phone Audio Recorder Extra Long 18ft / 5meter Airplane Cockpit Intercom with USB Power HERO3 / HERO3+ / HERO4,
Amazon.com: Nflightcam Aircraft Audio/Power Cable for GoPro Hero : Electronics
NFlightCam Helicopter Intercom Cable for GoPro Hero5/Hero6/Hero7/Hero8/Hero9/Hero10
Buy NFlightCam Prop Filter for GoPro Hero 5-7 - from Mendelssohns