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QNAP NAS Network Attached Storage TS-251B 2-Bay Home/SOHO NAS with PCIe Expansion (4GB RAM Version). Intel Dual Core 2.0GHz, 4GB RAM, 2 x SATA 6G, 1 x GbE LAN, 1 x PCIe Slot for 10GbE/M.2 SSD with QM2 card, AES-NI Encryption, Hardware Video Transcoding Intel Celeron J3355 dual-core 2.0GHz (up to 2.5GHz), 4GB DDR3L SODIMM RAM (1x4GB, 2 DIMM slots, max 8GB total), SATA 6Gb/s, 1xGbE, PCIe slot for 10GbE/M.2 SSD with QM2 expansion card, built-in speaker, 2x 3.5mm MIC In, 1x Line out *HARD DRIVES SOLD SEPARATELY*