I picked up the SYNCO G1 (A2) wireless mic kit to use with my GoPros to improve the audio. This how I'm going to set it up for on the water use.
You can go to the 8:00 minute mark to check the sound quality.
SYNCO-G1(A2)-Wireless-Lavalier-Microphone-System 2.4GHz Lapel Mic 1-Trigger-2 Transmitter with Receiver
https://www.amazon.ca/gp/product/B08H...
3BR Powersports X~PWR-S5 48" All-Weather External Power Kit for GoPro HERO5 Session
https://www.amazon.com/X-PWR-S5-All-W...
Poweradd EnergyCell 5000mAh Power Bank
https://www.amazon.ca/gp/product/B07M...