Not loading just stuck. I contacted Fluke through Revain and they told me this was a 2016 unit, 4 years old and out of warranty. They had me send it to them to look at and luckily they sent it back to me for free saying it's new but I can say it's the same but refurbished. I don't know if I have a guarantee and I'm afraid if something happens to this device I can fix it. I had to go without him for months while everything fell apart. I had to pay $ to send it to Fluke for repair. I don't know how to comment on this, it's good if you fix it by just paying shipping or going through this whole ordeal. I think this is my fault and my mistake buying on Amazon. You just don't know what you're getting. New refurbished 4 year old model out of warranty,,,,,,,?