4-Bay / Intel Celeron J4125 / Quad-core 2.0 GHz ( Up to 2.7GHz ) / 4GB DDR4 Non-ECC ( up to 8GB Non-ECC SO-DIMM ) / 4K Hardware Transcoding Engine / 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