CPU: Intel Celeron J4125 ; 4- Core 2.0 GHz, burst up to 2.7 GHz System Memory: 2GB DDR4 non-ECC (expandable up to 6GB, 2 GB + 4 GB ) Internal HDD: 4x 3.5" or 2.5" SATA HDD/SSD (Diskovi nisu uključeni) M.2 Drive Slots: 2 (NVMe) External Ports : 2x USB 3.2 Gen 1 ports 1x RJ-45 1GbE LAN Port 1x RJ-45 2.5GbE LAN Port Max Supported IP Camera: 40 (including 2 Free License) Capable Performance Up to 278/281 MB/s sequential read/write throughput1 supports stable data transfers Fast Networking Built-in 2.5GbE port for fast connectivity out of the box Versatile Network Storage Leverage built-in file and photo management, data protection, and surveillance solutions Centralized Data Storage Store up to 80 TB of data 2 in one place, maintain 100% data ownership, and enjoy multi-platform access Extendable Product Support Backed by Synology's 3-year limited hardware warranty, extendable to 5 years