Set the pressure you want (up to 40 psi), hold the trigger and it shuts off automatically when it hits the pressure. The inflator itself will inflate to 200 psi, but the auto shut-off does not work over 40 psi. But for cross, who cares? You shouldn't be running your cotton casing tubs over 30 psi anyway. You aren't, are you?
The inflator comes stock with a hose for Schraeder valves and an adapter for Presta. But the only way to fly is to use a Silca head. Yes, I sacrificed the hose from my 19 year old Silca pump.
I took the old barb that screws into the Silca pressure guage, turned it down to fit into the inflator and added a few ribs to give it some bite. I am sure there other creative ways to make it work if you don't have a lathe handy. But I do. So I used it.
Want one of your own?
You also need to buy the battery pack and charger.
Ridiculous waste of money? You bet! But now the good doctor can pump up her tires exactly the same way every time. Be the first on your block to have one...