Synology (RS818+) – RS818+ 4-Bay / 1U Rackmount / INTEL Atom C2538 / Quad Core 2.4GHz / 2GB DDR3L (up to 16GB) / 2 x USB 3.0, 1 x eSATA / 4 x Gigabit LAN / SHR, RAID 0,1,5,6,10 / 1 x PCIe x8 Slot for NIC / Synology High Availability / 2 x IP Cam Licenses (up to 40) / 3 Years Warranty / Optional Rail Kit: Sliding (RKS1317), Mounted (RKM114) Expansion: RX418

Synology (RS2818RP+) – RS2818RP+ (Redundant Power Supply) 16-Bay / 3U Rackmount / INTEL Atom C3538 / Quad Core 2.1GHz / 4GB DDR4-2133 (up to 64GB) / 2 x USB 3.0, 1 x Expansion / 4 x Gigabit LAN / SHR, RAID 0,1,5,6,10 / 1 x PCIe x8 Slot for NIC / Synology High Availability / 2 x IP Cam Licenses (up to 40) / 3 Years Warranty / Optional Rail Kit Sliding (RKS1317) / Expansion Unit (RX1217 / RX1217RP)