Some brand names of dvd burners will state bulk and retail,and they are a little different from one another. Benq is one of them. The older 1620 had the bulk version and retail version. For some odd reason,the re-tail version were the re-badges,and the bulk drives were the genuine drives.This sounds like it's backwards. Their firmware version will be different: Bulk= B7V9 Retail= G7V9 2 different firmwares-even though both made by benq 1620. Crossflashing can be performed to turn the retail drive into the bulk drive. Lots of re-badges out there: Benq/Lite-on/Sony/and even plextor. Check out newegg.com for any future drives.Great prices and cheap shipping.