Qnap TS431P 4Bay Network Attached Storage

CPU : AL-212, 2-core, 1.7GHz
System Memory : 1GB DDR3 RAM
Flash Memory : 512MB NAND flash
Hard Drive Tray : 4
Drive Interface : SATA 3.5"/2.5" 6Gb/s HDD/SSD ; Hot-swappable
USB : 3 x USB 3.0 port (Front x1; Rear x 2)
LAN Port : 2 x GbE RJ45
LED Indicators : System Status, HDD, USB, LAN
Buttons : Power, Reset, USB One-Touch-Copy
System Warning : Buzzer
Form Factor : Tower
Dimensions (H) x (W) x (D) : 169 x 160 x 219 mm 6.65 x 6.3 x 8.62 inch
Weight : Net: 3 kg (6.61 lbs); Gross: 4.3 kg (9.48 lbs)
Operating Temperature : 0 - 40°C / 32~104°F
Relative Humidity : 5~95% non-condensing, wet bulb: 27°C
Power Supply : AC adapter, 90W, 100 - 240V
Power Consumption HDD standby: 11.65W In operation: 26.7W (with 4 x 1TB HDD installed)
Sound Level : Operating low speed: 19.5 dB(A)
Security Design : Kensington security slot
Fan : 1 x 12 cm smart fan (12V DC)