Alternator has been well packaged and factory tested. Very solid well built unit. This alternator idles at 14.40 volts when nothing is on. With all accessories idling it holds 14.02v. A definite improvement over the old alternator. If you are upgrading to a 3G generator for your old Mustang, this is a great device. Just make sure you cut out the mount as this unit is a bit larger and get upgraded wiring to handle the extra power. You can't go wrong in this price range.