This sale is for a fully functional TS-259 Pro NAS.     It's a fantastic compact and sleek looking unit that due to it's compact size and low sound footprint is easy to conceal and forget is running. 

It comes with the original PSU and a key for locking the two drive bays included (compatible with 3.5" and 2.5" disks).

It's got great socket support and expandability options (including 2x Gigabit ethernet).  

Note that you will need to add your own hard disks for storage.   

More specs follow:

CPUIntel® Atom™ Dual-core Processor
DRAM1GB DDRII RAM
Flash Memory512MB DOM
HDD2 x 2.5"/3.5" SATA
NOTE: The system is shipped without HDD.
HDD Tray2 x Hot-swappable and lockable tray
LAN Port2 x Gigabit RJ-45 Ethernet port
LED IndicatorsStatus, LAN, USB, eSATA, Power, HDD 1, HDD 2
USB5 x 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
Alarm BuzzerSystem warning
Form FactorTower
Dimensions150 (H) x 102 (W) x 216 (D) mm
5.91 (H) x 4.02 (W) x 8.5 (D) inch
WeightNet weight: 1.74 kg (3.84 lbs)
Gross weight: 2.92 kg (6.44 lbs)
Sound Level (dB)w/o HDD installed: 33.3 dB
Stand by: 33.7 dB
In operation: 34.2 dB
(with 2 x 1TB HDD installed)
Power Consumption (W)Sleep mode: 16W
In Operation: 25W
Power-off (in WOL mode): 1W
(with 2 x 1TB HDD installed)
Temperature0~40˚C
Humidity0~95% R.H.
Power SupplyInput: 100-240V AC, 50/60Hz, Output: 84W
Secure DesignK-lock security slot for theft prevention
VGAReserved VGA interface for maintenance
Fan1 x smart fan (7 cm, 12V DC)