CPUIntel® Atom 2.13GHz Dual-core Processor
DRAM1GB RAM (Expandable RAM, up to 3GB)
1. The system memory can be increased to 3GB by installing an additional 1GB/2GB SO-DIMM RAM module.
2 .For the information of RAM module installation and compatible NAS models, please refer to the QNAP RAM Module Installation Guide
Flash Memory512MB DOM
Hard Disk Drive4 x 3.5" or 2.5" SATA 3Gb/s hard drive or SSD
1. The system is shipped without HDD.
2. For the HDD compatibility list, please visithttp://www.qnap.com/en/index.php?sn=3877&lang=en
           <搭配硬碟 更多優惠!!>
Hard Disk Tray4 x Hot-swappable and lockable tray
LAN Port2 x Gigabit RJ-45 Ethernet port
LED IndicatorsStatus, LAN, USB, eSATA, Power, HDD 1, HDD 2, HDD 3, HDD 4
USB2x USB 3.0 port (Back: 2)
5x USB 2.0 port (Front: 1; Back: 4) 
Support USB printer, pen drive, USB hub, and USB UPS etc.
eSATA2 x eSATA port (Back)
ButtonsSystem: Power button, USB One-Touch-Backup Button, Reset button
LCD panelMono-LCD display with backlight
Enter button, Select button for configuration
Alarm BuzzerSystem warning
Form FactorTower
Dimensions177 (H) x 180 (W) x 235 (D) mm
6.97 (H) x 7.09 (W) x 9.25 (D) inch
WeightNet weight: 3.65 kg (8.04 lbs)
Gross weight: 4.65 kg (10.24 lbs)
Sound Level (dB)w/o HDD installed: 34.7 dB
Stand by: 34.1 dB 
In operation: 36.8 dB 
(with 4 x 500GB HDD installed)
Power Consumption (W)Sleep mode: 25W
In Operation:43W
Power-off (in WOL mode): 1W
(with 4 x 500GB HDD installed)
Humidity0~95% R.H.
Power SupplyInput: 100-240V AC, 50/60Hz, Output: 250W
Secure DesignK-lock security slot for theft prevention
VGAReserved VGA interface for maintenance
Fan1 x quiet cooling fan (9 cm, 12V DC)
Ethernet cable x 2
Quick installation guide
Flat head screw x 16
(for 3.5" HDD)
Flat head screw x 12 
(for 2.5" HDD)
Power cord