Amazon.com : VidPro Microphone Adapter for GoPro Hero3 and Hero4 - 3.5mm to USB Mini : Electronics
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GoPro 3.5mm Mic Adapter for HERO 11/10/9/8/7/6/5 Black | Yantralay – yantralay
3.5mm Microphone Adapter Gopro | 3.5mm Mic Adapter Gopro Hero - Pro 3.5mm Adapter - Aliexpress
How to Connect External Mic to GoPro Hero6 - YouTube
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NFlightCam GoPro Audio Adapter Cable
Amazon.com : Movo GPR-5 GoPro Case with Microphone for Camera - for GoPro Hero 5, 6, 7 - Includes Movo VXR10 Microphone for iPhone, Android, Camera - Shoe Mount for Shotgun Mic -
Vlog Case Action Camera Housing Shell Vlogging Cage Frame with Cold Shoe Mount for GoPro Hero 7 6 5 Black for External Microphone & Pro 3.5mm Mic Adapter - Walmart.com