NAS QNAP 251D 2-Bay, CPU Intel Celeron J4025 2.0GHz Dual Core (max 2.90 GHz), 4GB DDR4 SODIMM (1x4GB), max. 8GB (2 DIMMs), 2.5" & 3.5" SATA 6Gb/s, 3Gb/s HDD (neincluse), 1 GigaLan (1 slot PCIe, max 3xGbE LAN sau 5GbE/ 10GbE) LAN optional via PCIe 2xUSB3.0 3xUSB2.0, tower, suport inclus 2 camere IP