DS-2FP2020 Microphone - variable gain?

triumph202

Pulling my weight
Feb 5, 2017
506
216
Australia
Is anyone using the Hikvision DS-2FP2020 microphone? Info on it is a bit scarce and I noticed in the below picture there is was looks like a potentiometer- is it for adjusting the gain of the preamp?

IC-DS-2FP2020.jpg