CPUMarvell 6281 1.2GHzDRAM256MB DDRII RAMFlash Memory16MB DOMHDD4 x 3.5" or 2.5" SATA I/II hard disk drive (HDD)NOTE:1. The system is shipped without hard disk drives.HDD Tray4 x hot-swappable trayLAN Port2 x Gigabit RJ-45 Ethernet portLED IndicatorsStatus LAN USB eSATA HDD 1 HDD 2 HDD 3 HDD 4USB4 x USB 2.0 port (Front: 1; Back: 3)Supports USB printer disk pen drive USB hub and USB UPS etc.eSATA2 x eSATA port (Back)ButtonsPower button USB one-touch-backup button reset buttonAlarm BuzzerSystem warningForm FactorTowerDimensions177(H) x 180(W) x 235(D) mm6.97(H) x 7.09(W) x 9.25(D) inchWeightNet weight (NAS only) : 3 Kg (6.61 lbs)Gross weight (with packing and accessories) : 4.66 kg/10.27 lbPower Consumption (W)Sleep mode: 11WIn operation: 26W(with 4 x 500GB HDD installed)Temperature0-40C/ 32-104°FHumidity5~95% RH non-condensing wet bulb: 27C.Power Supply90W AC adapter 100-240V~/2A-1A 50-60HzSecure DesignK-Lock security slot for theft preventionFan1 x quiet cooling fan (9 cm 12V DC)