Sans Digital Rackmount eSATA External Hard Drive Enclosure ER104CT Form Factor: 1U Rackmount External I/O: USB 2.0, eSATA, Firewire 800 (1394b), Firewire 400 (1394a) Control Interface: LCD, Switch Drive SATA 150 & 300 Expansion 3.5-Inch Drive Bays 4 Cooling Fan: 1.5" Ball Bearing Fan Power Supply :Input: AC 90-260V, 50Hz/60Hz;Output: DC +5V/8.4A +12V/6A (12V peak current 4A/10sec)