How do air shocks work? Do they act as both a shock and a spring? Can you change the pressure in them to adjust ride height? Do they make air shocks that can have a hose permanently attached, so you can change the pressure "on the fly"?

YUP THATS HOW THEY WORK.........AIR THEM UP AND LIFTS THE RIDE.....STIFFENS IT UP........HAVE ON BOARD AIR AND YOUR SET....