Amazon.com : Removu RM-M1+A1 Wireless Microphone and Receiver for GoPro Hero4, Hero3+ & Hero3 : Electronics
Amazon.com: BOYA Wireless Microphone Lavalier for Smartphone Camera GoPro, BY-WM2G Mic for iPhone 11 10 X 8 8 Plus 7 6,Canon 6D 600D Nikon D800 D3300 Sony A7 A9 DSLR GoPro Hero4
Amazon.com : Removu RM-M1+A1 Wireless Microphone and Receiver for GoPro Hero4, Hero3+ & Hero3 : Electronics
REMOVU A1+M1 - Waterproof Bluetooth Microphone for GoPro Hero® - YouTube