QNAP TS-251D-4G 2 Bay NAS Intel® Celeron® J4005 dual-core 2.0 GHz processor 4 GB SO-DIMM DDR4 Hot-swappable 1xGbE 1xPCIe Gen 2 x4 2xUSB 3.2 2yrs warty The TS-251D integrates secure data storage and multimedia entertainment into one device. Featuring a PCIe slot, the TS-251D allows you to flexibly extend NAS functionality and potential applications. You can enhance overall system performance by installing a QNAP QM2 card for M.2 SSD caching/10GbE connectivity combined with Qtier auto-tiering storage and installing a 10GbE/5GbE/2.5GbE network expansion card. In addition, TS-251D can be used with QNAP’s smart AI photo management application, QuMagie, which integrates AI image recognition to group similar photos together in album “People', “Things' and “Places'. The TS-251D features an HDMI slot to stream multimedia throughout your home. The TS-251D supports dual-channel hardware decoding and transcoding, allowing you to view NAS media files smoothly across various devices. Powered by Intel® Celeron® J4005 dual-core 2.0 GHz processor (burst up to 2.7 GHz), DDR4 RAM (up to 8 GB), one Gigabit LAN port, and supports SATA 6Gb/s hard drives, the TS-251D combines network expansion cards to create dependable read/write performance. The TS-251D features Intel® AES-NI 256 hardware-accelerated encryption for both full NAS volumes and shared folders, boosting system performance while securing sensitive data stored in the TS-251D. CPU Intel® Celeron® J4005 dual-core 2.0 GHz processor (burst up to 2.7 GHz) CPU Architecture 64-bit x86 Graphic Processors Intel® HD Graphics 600 Floating Point Unit System Memory 4 GB SO-DIMM DDR4 (1 x 4 GB) Memory Slot 2 x SO-DIMM DDR4 Drive Bay 2 x 3.5-inch SATA 6Gb/s, 3Gb/s Hot-swappable M.2 SSD Slot Optional via a QM2 PCIe adapter Gigabit Ethernet Port (RJ45) 1 1xPCIe Gen 2 x4 USB 3.2 Gen 1 port 2 Power Supply Unit External Power Adapter, 65W, 100-240V Dimensions (HxWxD) 168 × 105 × 226 mm 2 yrs warranty