Raidsonic SR5620-4S-SB2. Hard drive capacity: 2000 GB, Hard drive interface: Serial ATA II, Hard drive size: 88.9 mm (3.5 "). Data transfer rate (max): 3000 Mbit/s. Power requirements: 100-220 V. Weight: 5.2 kg. Package dimensions (WxDxH): 400 x 230 x 195 mm