This was the fourth reader/writer I bought. We had a server matrix that interacted with our door controller. So we had 50 pieces of jewelry and no record of what it was. The first 3 readers, copiers will read and display this number, but I still have no idea what this number is for. I needed to show object id and id number. It will do this simple task. I emailed the seller and actually got a response within a few hours. The seller even offered a half price product of this reader/writer, but I liked the ability to duplicate the card. The device comes with cards and keychains worth about $30. It takes a few tries to read really old keychains, but you'll get the job done if you're persistent. It reads new cards and key fobs very quickly. It's not a $300 proxy card reader, but I don't need it and it will get the job done. This was the cheapest reader/writer I could find and it works as promised.
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