Even though it says Heavy Duty I couldn't get 65psi in my truck tires. It arrived yesterday, I went to check it and it failed. I serviced 1 tire from 60 to 65 psi in about 6 minutes. As I walked to the next bus, the fuse blew. I replaced the fuse (supplied with a spare). Hooked it up to the battery, checked the auxiliary lights on board, set the psi, flipped the switch, it pumped and the second fuse blew. I'm sending the pump back. If it doesn't work when testing at home, I can't rely on it when I'm out and about. Too bad.