Server, NAS, Btrfs, 100-240VAC, 50/60Hz, 1 Phase, Redundant Power, CPU Intel Atom C3538/64-bit/Quad Core 2.1GHz, 4GB DDR4 UDIMM, 1x Expansion Port, 2x USB 3.0 Ports, 4x RJ-45 1GbE LAN Ports, 88 mm x 482 mm x 724 mm, RoHS