Amazon.com: Hero 4 Microphone Compatible with GoPro Hero 4 Silver Black White Edition, Hero 3, Canon, Nikon Camcorder DSLR Camera- External Lavalier Lapel Mic : Electronics
Mini USB to 3.5mm Microphone Mic Adapter wire Cable for GoPro Hero 3 3+ 4 Camera | eBay
Amazon.com : Microphone Adapter for GoPro Hero3 and Hero4 Only 3.5mm to USB Mini : Electronics
Amazon.com: Hero 4 Microphone Compatible with GoPro Hero 4 Silver Black White Edition, Hero 3, Canon, Nikon Camcorder DSLR Camera- External Lavalier Lapel Mic : Electronics
Microphone Adapter Mini Usb To 3.5mm Microphone Adapter Data Transfer For Gopro Hero 4 3+ 3 2 1 Action Camera Accessory - Microphones - AliExpress
GoPro HERO4 Silver with QR Frame and Production Microphone Kit
Movo GMA100 | GoPro 3.5mm Mic Adapter | GoPro HERO3, 3+ & 4 Mic Adapter
Mini USB to 3.5mm Microphone Mic Adapter Cable for GoPro Hero 3 3+ 4 Camera | eBay
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
Gopro Hero4 Silver - internal vs. external microphone - YouTube