This product is either discontinued or we cannot get that from suppliers.
QNAP TES-1885U-D1531-16GR HDD Network Storage, 10 Gigabit Ethernet, Expansion Bays-18, Expansion Slots-4, 2.5" Bays-6, Rack Height 2U, Rack-mountable, Processor Speed 2.20 GHz, Standard Memory 16GB, Controller 12Gb/s SAS.
Powered by an Intel® Xeon® D processor, the powerful enterprise-class TES-1885U is open for two operating systems - either the FreeBSD-based QES or Linux-based QTS.