How do I use an external microphone with my YI 4K+ Action Camera?

An external microphone accessory or another component can provide enhanced audio for your video recordings.
a. Turn on the 'External Microphone' option in the system settings menu.
b. Connect the external microphone accessory to your camera's USB Type-C port using a 3.5mm MIC Adapter (sold separately).

Please note that if the camera doesn't' have external microphone devices plugged in while recording, please don't turn on the camera's External Microphone option, otherwise it will result in creating video noise.