This product is either discontinued or we cannot get that from suppliers.
QNAP TS-251+-8G 2 Bay Diskless NAS, Quad-Core Intel® Celeron® 2.0GHz (burst up to 2.42GHz), 8GB DDR3L RAM (2 x 4GB), 2x 2.5" or 3.5" SATA 6Gb/s, 3Gb/s HDD or SSD; hot swappable trays, 2x Gigabit RJ-45 Ethernet ports, 2x USB 3.0 Ports (Front: 1, Rear: 1), 2x USB 2.0 Ports (Rear), 1x HDMI Port.
Qnap Ts251+ Nas Tower Intel Celeron J1900 quad-core 2.0 GHz processor (burst up to 2.42 GHz) Network Storage (TS-251+-8G) is powered by a 64-bit Intel® Celeron® quad-core 2.0GHz processor and has 2GB/8GB energy-efficient DDR3L RAM.