Music Input and Audio Record Connect Cable for Intercom AUX Port – Rugged Radios
Amazon.com : SOONSUN Skeleton Housing Case with LCD Touch Backdoor for GoPro Hero 4, Hero 3+, Hero 3 Cameras, Side Open Housing Case Allows Charging Camera Without Removing The Housing Case - Transparent Blue : Electronics
Sound Indicator: GoPro HERO3 Menu and camera setup - YouTube
Sena Bluetooth Audio Pack for GoPro - Wireless Audio System! REVIEW - YouTube
GoPro HERO 3 Audio Recorder Headset Adapter
Movo GM100 | Condensor GoPro Mic | Battery-Free Omidirectional Lav Mic
SENA Bluetooth Audio Pack with Waterproof Housing GP10-02 B&H
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
150cm Professional Mini USB Omni-Directional Stereo Mic Microphone with Collar Clip for Gopro Hero 3 3+ 4 - Walmart.com
BOYA BY-LM20 Lavalier Clip-on Microphone for GoPro Hero 4 3 3+ Canon Nikon Sony Panasonic DSLR Camera Camcorder Audio Video Mic - FOMITO.SHOP
SENA Bluetooth Audio Pack for GoPro HERO3, HERO3+, and GP10-01
Motion Camera Mini USB to 3.5mm Microphone Transfer Cable for GoPro Hero 3 3+ 4 Mini USB External Mic Audio Adapter _ - AliExpress Mobile
Amazon.com : SOONSUN Frame Mount Housing Case with External Lavalier Lapel Clip-on Microphone for GoPro Hero 3, Hero3+, Hero 4 Black White Silver Action Cameras : Electronics
NFlightCam Cockpit Kit for GoPro Hero3, Hero3+, Hero4 – Nflightcam.com
NFlightCam Aviation Audio+Power Cable for GoPro Hero3, 3+, and 4 – Nflightcam.com