QNAP (TS-253D-4G) – TS-253D-4G / TS-253D-4G 2-Bay NAS | Intel Celeron J4125 2.0GHz Quad Core (burst up to 2.70GHz) RAM: 4GB DDR4 RAM (1 x 4GB) | MAX RAM: 8GB DDR4 RAM (2 x 4GB) | 4GB DOM (Dual boot OS protection) Internal Storage: 2 x 3.5″/2.5″ SATA 6G | Hotswap | Optional 2 x M.2 (SATA/PCI-E) Slots External Ports: 3 x USB3.2 Gen 1, 2 x USB2.0, One Touch Copy Button | 1 x HDMI 2.0 GPU: Intel UHD Graphics 600, Support 4K H264 / H265 IR Sensor: Built-In | IR Remote: RM-IR004 (Optional) GbE Ports: 2 x 2.5GbE (RJ45), Optional 5GbE / 10GbE PCI-E Slots: 1 x PCIe Gen2 x4 Slot PCI-E Support: QWA Wi-Fi Card / QM2 Card / 5G LAN Card / 10G LAN Card / FC Card / USB3.2 Card OS: QTS | File System: EXT4 | RAID Level: RAID 0, 1, JBOD | Support QTier™ Auto Tiering Expansion Units: 2 x TR units / 1 x TL unit / 8 x VJBOD units Surveillance Station: 4 x IP Cam Licenses (up to 40) / QVR Pro: 8 x IP Cam Licenses 3 Years Carry-In Warranty (Optional: Upgrade to 5 Years Carry-In / Onsite Warranty)