Acquired for the specific purpose of getting rid of annoying "low pressure" lights on the dashboard because weather in the South is finicky, fickle, and annoying.Battery has a nice life indicator on it, and there's a 12v adapter for emergencies, though as with most pumps that have a 12v cord, better hope it's long enough! At any rate, got all four tires from 28 to 32 in less than 5 minutes. It takes about 15 seconds from showing the initial pressure reading before it will let you bump the triggeSee full review