How to record audio with Sightmark 4K mini?

Hello All,
Just wondering if anyone knows how to record audio with the Sightmark Wraith 4K mini. Does it need an external mic? I haven’t transferred any video files yet, maybe I’m already recording audio and don’t even know it? Haven’t found anything in the manual. Any help would be appreciated. I want to hear the pellet hit the 🐀
It records sound while recording video. You will hear what you will while watching your uploads.