that i can adjust if the boost is going over or under what it should. After adjusting i can make it sync up with my autometer boost gauge exactly. Check your Blitz manual and see if there is a similar setting for your unit.
Nice job on your instal by the way. That matches real well. When i was thinking about getting that unit, I was going to try and modify the ashtray to get the blitz bc to fit in there sideways.