Save your money and buy something else. Hard to beat a Snap-on or factory tool. I have had mine for a couple years. It's been sent back in at least three times for freezing up. There are a lot of functions not in this scanner that are in others. This is just a quick check type of scanner and is of no use for the difficult jobs. Just to note, I purchased mine from the Mac tool dealer. I have been using his loaner for over 8 months waiting for mine to come back (again). Very poor product!