Qnap TS-453D-4G 4-Bay NAS Enclosure - Intel Celeron J4125 quad core Processor (2.0 GHz, up to 2.7GHz), 4 GB SO-DIMM DDR4 RAM (1 x 4GB, 2 x slots free, 8GB Max), 4GB Flash Memory, Intel HD Graphics 600, Drive Interface: 4 x 3.5-inch, 6Gb/s, 3Gb/s SATA Hard Drives Bays, IR Sensor, Connectivity: 3 x USB 2.0, 2 x USB 3.2 Gen, 1 x HDMI 2.0, 2 x Gigabit Ethernet Port, 1 x PCIe Gen2 x2 slot for 10GbE/5GbE/1GbE or QM2 M.2 SATA/NVMe SSD adapter, 90W Power Supply