SJCAM external Mic for SJ6 Legend detail Review - YouTube
M3 Moto - USB type C to 3.5mm audio mic adapter + micro usb combo. For SJCAM SJ8 series only. Finally you can use your favorite microphone through 3.5mm audio jack and
SJCAM SJ7 Star & s6 legend Action Camera External Mic Adapter DIY for Motovlogging - YouTube