Maybe you can try turning bluetooth off (Fn+B then -) or temporarily removing the battery. But in my opinion, your best option is to RMA it. 

Hi guys, I just got my AnnePro today and as soon as I hit FN+R the lights come up and a noticeable coil whine starts:

https://www.youtube.com/watch?v=sAtGaTQr4Ok

Reset doesn't help and the noise is the same with and without USB cable plugged. Any ideas other than RMA?

**Update** Noise has stopped completely for some reason. Maybe there was humidity in the case from shipping or something... Looks good for now.

**Update2** While playing around with Bluetooth configs, buzzing is back. Upgraded firmware, tried different led settings, resetting etc. No luck. Going to RMA it.

RGB coil noise