Product Model: TS-251A-4G

2-Bay NAS, 4GB DDR3L RAM (max 8GB), SATA 6Gb/s, 2 Giga LAN, USB QuickAccess, hardware transcoding, HDMI, AES-NI encryption engine, Virtualization Station, Surveillance Station (Free: 2, Max 32 Ch), max 1 UX-800P/UX-500P expansion unit.

    The TS-251A is powered by an advanced 14nm Intel® Celeron® dual-core 1.6GHz processor that features low TDP (only 6 watts) and can automatically burst up to 2.48GHz. Coupled with dual-channel 2/4GB DDR3L-1600 dual-channel RAM (upgradable to 8GB), dual Gigabit LAN ports, and SATA 6Gb/s, the TS-251A can deliver up to 211.88 MB/s throughput for optimizing mission-critical tasks while still being energy efficient. The TS-251A also features Intel® AES-NI hardware-accelerated encryption to deliver up to 209.13 MB/s throughput with AES-NI encryption for both full NAS volume and shared folders, boosting system performance & security while ensuring the safety of sensitive business data stored in the NAS.

    Hardware Specifications:

    Processor: 14nm Intel® Celeron® N3060 dual-core 1.6GHz (up to 2.48GHz)

    System Memory: 4GB DDR3L (2 x 2GB)

    Maximum Memory: 8GB

    Memory Slot: 

    2 x SODIMM DDR3L (For dual-DIMM configurations, you must use a pair of identical DDR3L modules.)

    Flash: 4GB, pre-loaded with QTS system

    Drive Type: 2 x 3.5″/2.5″ SATA 6Gb/s HDDs/SSDs

    GbE LAN: 2 x Gigabit RJ45 LAN port

    USB Port: 3 x USB 3.0 ports (Front: 1, Rear:2)

    USB QuickAccess: (USB 3.0 Micro-B); USB cable is not included

    HDMI: 1, max. resolution 3840 x 2160 @ 30Hz

    Audio Input: 3.5mm Microphone Input jack (for dynamic microphone)

    Audio Output: 3.5mm Line Out jack (for ampliers or speakers)

    LED Indicator: Status/Power, USB, HDD 1, HDD 2

    Button: Power/Status, USB one-touch-backup, reset

    IR Receiver: supports QNAP RM-IR002 and MCE-compliant remote controls

    Others: Kensington security slot,system maintenance port


    169 x 102 x 219 mm

    6.65 x 4.02 x 8.62 inch (HxWxD)


    Net: 1.28 kg (2.82 lbs)

    Gross: 2.64 kg (5.82 lbs)Operating

    Temperature: 0-40˚C

    Relative Humidity: 5~95% RH non-condensing, wet bulb: 27˚C

    Noise Level: 

    18.3 dB (A)

    Refer to ISO 7779 ; Maximum HDD loaded ; Bystander Position ; Average data from 1 meter in front of operating NAS

    Power Consumption: 

    System sleep: 0.72W

    HDD standby:7.9W

    In operation:16.2W

    (with 2 x 2TB HDDs)

    Power: 65W AC power adapter, 100-240V AC

    Fan: 1 x 7cm system fan (12V DC)