Sans Digital HDD Enclosure eSATA External Hard Drive Enclosure MS2UT+B Drive interface: 2 x 3.5" SATA / SATA2 hard drive. HDD Trays: 2x 3.5" Hot-Swappable Hard Drive Trays Maximum Capacity: 3 TB Maximum Capacity: 3 TB Drive Interface: SATA I & SATA II Power Supply: 80W (110V ~ 240V) Status Indicators: RAID Alarm, Fan / Temperature, Power LEDs Form Factor: Cube