Fantec MR-35HDC. RAID levels: 0/1/JBOD/BIG, Hard drive interface: Serial ATA, Hard drive size: 88.9 mm (3.5 "). Cables included: USB 2.0. Power requirements: 100-240V ~50-60Hz. Weight: 2.5 kg. Compatible operating systems: Windows 98SE/ME/2000/XP/Vista Mac OS X Linux