PCS-Electronics

I recently got a used Pro Max 1 with no manual of course and I was wondering if there is a way to adjust the power output. I see that there are a couple turn screw adjusters on the board but I don't know what they are for...figured I'd ask before I play around lol. Currently it is running around 4.5-5 watts right now and I heard it's capable of 5-7, if I'm correct. I wasn't sure if thats a varable output, what you get is what you get, or you can adjust.

Thanks!