This can speed up jacking a vehicle up with ease if that's what you're looking for.It is a heavy unit (as jack should).Jack-up starts as soon as you open the valve, you can control how fast it inflates with the valve.The exhaust valve is throttled to make it deflated slowly and safely. There's a relief valve you can pull on if you wanted faster deflation.The hoses going from the valves to the jack don't look safe to me, they are clear hoses so I don't think they can handle more than 120PSI (Maybe 100PSI max) I recommend replacing them with higher quality pressure hoses just to be safe.Be careful when positioning the jack as it can tilt during a jack-up!