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
SHILL 3.5mm Microphone Adapter for GoPro HERO3 & HERO3+ SLMA-3
Music Input and Audio Record Connect Cable for Intercom AUX Port – Rugged Radios
For gopro accessories External Stereo Microphone 3.5 mm Mini USB Mic Adapter Cable for GoPro Hero 3 3+ 4 4 session Action Camera|usb mic|mini usb micusb adapter mic - AliExpress
Amazon.com: Movo GM100 Clip-on Lavalier Microphone for Compatible with GoPro HERO3, HERO3+ and HERO4 Black, White and Silver Editions - Includes Mic Adapter for Go Pro
Movo GMA100 | GoPro 3.5mm Mic Adapter | GoPro HERO3, 3+ & 4 Mic Adapter
Amazon.com : CamDesign 3.5mm Female to Mini USB Male Microphone Adapter Audio Transfer Cable Cord Compatible with GoPro Hero 1 2 3 Hero3+ Hero4 & Sports : Electronics
MG-83H) GoPro HERO4 and HERO3/3+ Recorder Adapter For Helicopter Headsets
Pro 3.5mm Camera Mic Adapter | GoPro
Gopro Hero 3 Microphone Adapter | Camera Accessories Kit - Sports & Action Video Cameras Accessories - Aliexpress