air suspension- necesary?

[Big Z]

If you want the air suspenion to work, you need the Air compressor. When loading down or pulling a trailer, boat, or whatever, the system will compensate-self level-adjust the ride height of the H2. There is also an air jack for filling your tires if you carry the hose, and a button to raise and lower the rear.
Didn't mean to confuse with the tow/haul, as they are not allways used together.