U use that to hide usb stick in dsm. That's the vid and pid of original synology.
Read Here: http://www.techspot.com/review/649-syno ... page2.html
"This tiny PCB features a USBest UT165-L46 controller that's often found in thumb drives and is connected to a single Samsung K9F1G08U0C-PCB0 128MB memory chip, which is designed to house the operating system."