Synology (DS918+) – DS918+ 4-Bay / Intel Celeron J3455 / Quad Core 1.5GHz ( Up to 2.3GHz ) / 4GB DDR3L ( up to 8GB ) / 2 x USB 3.0, 1 x eSATA/ 2 x M.2 NVMe 2280 SSD Slot / 2 x Gigabit LAN / SHR, RAID 0,1,5,6,10 / Synology High Availability / 2 x IP Cam Licenses (up to 40) / Expandable to 9 Bay / 3 Years Warranty Suggested SSD: Samsung 960 EVO (250GB/500GB/1TB): https://goo.gl/vdRaoF

Synology (RC18015xs+&RXD1215sas) – RC18015xs+ (Redundant Power Supply)1U Rackmount / INTEL Xeon E3 Quad Core 3.3GHz / 8GB DDR3 ECC RAM (up to 32GB) / 2 x USB 3.0, 1 x Mini SAS-Out / 5 x Gigabit LAN with 1 for Heartbeat Connection / 1 x PCIe x8 Slot for NIC / Synology High Availability / 2 x IP Cam Licenses (up to 90) / 5 Years Warranty / Optional Rail Kit Sliding (RKS1317) / Optional 10GbE Network Capability (E10G15-F1) / Can link up with max. 15pcs RXD1215sas as 180-Bay NASRXD1215sas (Redundant Power Supply)12-Bay (SAS ONLY) / 2U Rackmount / 2 x Mini SAS-IN, 2 x Mini SAS-OUT / Synchronized with RC18015xs+ / RAID 0,1,5,6,10 / 5 Years Warranty