Wiebetech RTX400H-SV. Total storage capacity: 4000 GB, Hard drive capacity: 1000 GB, Hard drive interface: Serial ATA, Serial ATA II. Power requirements: 100-240 V. Weight: 11.7 kg. Compatible operating systems: Windows XP/Server 2003/Vista Mac OS X 10.2.6 Linux. Certification: CE/FCC, RoHS