NAS QNAP TS-251B-4G 2-Bay - NAS QNAP 2Bay TS251B 4GB

CPU Intel Celeron J3355 dual-core 2.0 GHz processor (burst up to 2.5 GHz) CPU Architecture 64-bit x86 Graphic Processors Intel HD Graphics 500 Floating Point Unit Encryption Engine (AES-NI) Hardware-accelerated Transcoding System Memory 4 GB SO-DIMM DDR3L (1 x 4 GB) Maximum Memory 8 GB (2 x 4GB) Memory Slot 2 x SO-DIMM DDR3L For dual-DIMM configuration, you must use a pair of identical DDR3L modules. Flash Memory 4GB (Dual boot OS protection) Drive Bay 2 x 3.5-inch SATA 6Gb/s, 3Gb/s The system is shipped without HDD. For the HDD compatibility list, please visit https://www.qnap.com/compatibility/ Drive Compatibility 3.5-inch SATA hard disk drives 2.5-inch SATA hard disk drives 2.5-inch SATA solid state drives Hot-swappable M.2 SSD Slot Optional via a PCIe adapter SSD Cache Acceleration Support Gigabit Ethernet Port (RJ45) 1 Expandable with an optional PCIe adapter 10 Gigabit Ethernet Port Optional via PCIe expansion card Wake on LAN (WOL) Jumbo Frame PCIe Slot 1 Slot 1: PCIe Gen 2 x2 PCIe bandwidth limitations will restrict the NAS 10GbE performance. USB 2.0 port 3 USB 3.2 Gen 1 port 2 USB 3.2 Gen 2 (10Gbps) Port Optional via a PCIe expansion card IR Sensor (RM-IR004) HDMI Output 1, HDMI 1.4b (up to 3840 x 2160 @ 30Hz) Audio Input 2 x 3.5mm dynamic microphone input jacks Audio Output 1 x built-in speaker, 1 x 3.5mm line out jack (for amplifier or headphone amplifier) Form Factor Tower LED Indicators Power/Status, LAN, USB, HDD1-2 Buttons Power, USB copy, Reset Dimensions (HxWxD) 168 × 105 × 226 mm Weight (Net) 1.53 kg Weight (Gross) 2.63 kg Operating temperature 0 - 40 °C (32°F - 104°F) Relative Humidity 5-95% RH non-condensing, wet bulb: 27˚C (80.6˚F)