CPU	Intel® Atom™ 2.13GHz Dual-core Processor
DRAM	1GB RAM (Expandable RAM, up to 3GB) NOTE: 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 Memory	512MB DOM
Hard Disk Drive	4 x 3.5” or 2.5” SATA 6Gb/s, SATA 3Gb/s hard drive or SSD NOTE: 1. The system is shipped without HDD. 2. For the HDD compatibility list, please visit www.qnap.com/compatibility.
Hard Disk Tray	4 x Hot-swappable and lockable tray
LAN Port	2 x Gigabit RJ-45 Ethernet port
LED Indicators	Status, LAN, USB, HDD 1, HDD 2, HDD3, HDD4
USB	2 x USB 3.2 Gen 1 port (Back: 2) 5 x USB 2.0 port (Front: 1; Back: 4) Support USB printer, pen drive, USB hub, and USB UPS etc.
eSATA	2 x eSATA port (Back)
Buttons	System: Power button, USB One-Touch-Backup Button, Reset button
Alarm Buzzer	System warning
Form Factor	1U, Rackmount
Dimensions	44 (H) x 439 (W) x 499 (D) mm 1.73 (H) x 17.28 (W) x 19.65 (D) inch
Weight	Net weight: 7.63 kg (16.82 lbs) Gross weight: 9.55 kg (21.05 lbs)
Power Consumption (W)	Sleep mode: 37W In Operation:52W Power-off (in WOL mode): 1W (with 4 x 1TB HDD installed)
Temperature	0-40˚C
Humidity	5~95% RH non-condensing, wet bulb: 27˚C.
Power Supply	Input: 100-240V AC, 50/60Hz, Output: 250W
Secure Design	K-lock security slot for theft prevention
VGA	Reserved VGA interface for maintenance
Fan	2 x quiet cooling fan (4 cm, 12V DC)