CPU	Intel Atom 1.8GHz Single-core Processor
DRAM	1GB RAM
Flash Memory	512MB DOM
HDD	2.5/ 3.5" SATA x4 NOTE: The system is shipped without HDD. For the HDD compatibility list, please visithttp://www.qnap.com/pro_compatibility.asp
HDD Tray	4 x Hot-swappable and lockable tray
LAN Port	2 x Gigabit RJ-45 Ethernet port
LED Indicators	Status, LAN, USB, eSATA, Power, HDD 1, HDD 2, HDD 3, HDD 4
USB	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
LCD panel	Mono-LCD display with backlight Enter button, Select button for configuration
Alarm Buzzer	System warning
Form Factor	Tower
Dimensions	177 (H) x 180 (W) x 235 (D) mm 6.97 (H) x 7.09 (W) x 9.25 (D) inch
Weight	Net weight: 3.65 kg (8.04 lbs) Gross weight: 4.65 kg (10.24 lbs)
Sound Level (dB)	w/o HDD installed: 29.1 dB Stand by: 36.9 dB  In operation: 37.3 dB  (with 4 x 500GB HDD installed)
Power Consumption (W)	Sleep mode: 23W In Operation: 33W Power-off (in WOL mode): 1W (with 4 x 500GB HDD installed)
Temperature	0~40˚C
Humidity	0~95% R.H.
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	1 x quiet cooling fan (9 cm, 12V DC)

Features
Modern business faces the challenge of dramatic growth of digital data, including documents, emails, applications, and so on. To deploy the IT environment with a reliable, affordable and expandable storage center to securely store, share, and back up the digital assets has become an important task for the server managers of the SMB and entry-level enterprise nowadays.

TS-439 Pro II+ houses up to four 3.5-inch or 2.5-inch SATA hard disk drives, incorporates Intel® Atom™ 1.8GHz single core processor and 1GB memory, and is capable of delivering ultra high performance, reliability, and lower power consumption during intensive data transfers. The NAS is an efficient and powerful business storage center with advanced iSCSI services, cross-platform data sharing, and all-in-one server applications. With VMware® Ready™ and Citrix® Ready™ certification, and proven compatibility with Microsoft Hyper-V environment, the NAS is an ideal shared storage solution in the virtualized and clustered environment.