C400

I use the C400 too and I’d try an SJCAM mic first before buying random USB-C mics. Mine was picky with external audio and not every USB-C mic gets detected even if it works on phones. If you want the least headache, I’d look at the SJCAM M1 wireless mic or an action camera specific Type-C mic first.

Check out SJCAM C400, see if it fits your budget. I was considering it for a while, but the price is too near the DJI Nano (~30% more if the Nano is on sale).