From my understanding, if the original owner sends in the warranty card the 2 yr warranty begins on the date of purchase. However, if the detector is sold then the transferable warranty begins on the date of manufacture which is determined from the serial number. So if one bought an AT Pro in June, 2014 that was manufactured in January, 2014, the original owner would have a warranty until June, 2016, but if it was sold, all the following owners would only have a warranty until January 2016. Is this a correct interpretation of how the warranty works?