A 20A fuse blew instantly in the unit. I replaced the fuse, then it didn't work. It took a few minutes to increase the pressure by 3psi. Even on cold days, the device heats up quickly. I do not like it at all. I do not recommend it at all. Seemed struggling to get up to 36.5psi on the display so I don't know if it can actually go to 150psi. This is ANOTHER of those products that look like they should be good, but they really aren't. I only used it a couple of times before it failed. The on/off switch has failed, the cable has disconnected from the terminal inside the device. Yes, I opened it up to try and fix it. I soldered the wire, but the switch was not repaired, just replaced. When I opened the case I saw how cheap and poorly made the POS was. I should have sent it back the first time it blew a 20A fuse. I'm really mad that I got ripped off like this. You'll do much better with a high-volume bicycle hand pump with a standard T-handle. Keep THIS in your car, NOT THIS.