DS720+ 2-Bay / Intel Celeron J4125 / Quad-core 2.0 GHz ( Up to 2.7GHz ) / 2GB DDR4 Non-ECC ( up to 6GB Non-ECC SO-DIMM ) / 4K Hardware Transcoding Engine / 2 x USB 3.0, 1 x eSATA, USB Copy / 2 x M.2 NVMe 2280 SSD Slot / 2 x Gigabit LAN / SHR, RAID 0/1, RAID 5/6/10 (with expansion unit) / Synology High Availability / 2 x IP Cam Licenses (up to 40) / 3 Years Warranty